WO2001086340A1 - Affichage d'image et methode de reglage de l'alignement - Google Patents
Affichage d'image et methode de reglage de l'alignement Download PDFInfo
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- WO2001086340A1 WO2001086340A1 PCT/JP2001/002304 JP0102304W WO0186340A1 WO 2001086340 A1 WO2001086340 A1 WO 2001086340A1 JP 0102304 W JP0102304 W JP 0102304W WO 0186340 A1 WO0186340 A1 WO 0186340A1
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- Prior art keywords
- optical
- image display
- display device
- lens
- unit
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0852—Catadioptric systems having a field corrector only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/002—Arrays of reflective systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
- G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/18—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical projection, e.g. combination of mirror and condenser and objective
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/181—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/10—Projectors with built-in or built-on screen
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/28—Reflectors in projection beam
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
- H04N9/3194—Testing thereof including sensor feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
- H04N5/7458—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of deformable mirrors, e.g. digital micromirror device [DMD]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
Definitions
- the present invention relates to an image display device for displaying an image by projecting an optical image signal provided with image information to a display means, and to an alignment adjustment method for an optical system component used in the image display device.
- FIG. 1 is a diagram showing a configuration of a conventional image display device.
- 1 is a luminous body that outputs light
- 2 is a parabolic reflector that reflects the light output from the luminous body 1 so that it is approximately parallel
- 3 is a light collector that reflects the light reflected by the parabolic reflector 2.
- This is a condensing lens.
- the illuminant 1, the parabolic reflector 2, and the condenser lens 3 constitute an illumination light source system.
- 4 is a light valve that spatially modulates the light condensed by the condenser lens 3 based on image information
- 5 is a projection optical lens that projects the light that is intensity modulated by the light valve 4 onto a screen 6
- 6 is This is a screen for displaying the light projected from the projection optical lens 5 as an image.
- the optical path is indicated by an arrow.
- the light output from the luminous body 1 is reflected by the parabolic reflector 2, and is condensed on the light valve 4 by the condenser lens 3.
- the light valve 4 spatially modulates the condensed light based on the image information.
- the intensity-modulated light is rearwardly projected onto the screen 6 by the projection optical lens 5 (left of FIG. 1). ) And projected as an image.
- the image is viewed from the front of the screen 6 in Fig. 1 (to the right in Fig. 1).
- the depth of the image display device in FIG. 1 corresponds to the distance from the illumination light source system including the light emitter 1, the parabolic reflector 2, and the light collecting lens 3 to the screen 6. If the image display device is capable of displaying images of the same size, it is preferable that the depth be as thin as possible. For this reason, the conventional image display device shown in FIG. 1 uses a wide-angle projection optical lens 5 to display an image on the screen 6 so that the depth of the image display device can be minimized and the thickness can be reduced. ing.
- the components of the illumination light source system, the light valve 4, and the projection optical lens 5 are arranged in the height direction of the image display device (vertical direction in FIG. 2). Is possible.
- the depth of the image display device in this case corresponds to the distance from the plane mirror 7 to the screen 6. If the inclination of the plane mirror 7 with respect to the horizontal direction is made larger than 45 °, the image display device can be made thinner, but the light valve 4 and the light source part interfere with the projection light, and the light is lost. Light path deviates from screen 6.
- Japanese Patent Application Laid-Open No. HEI 6-117767 discloses an image display device which uses a convex mirror instead of the plane mirror 7 shown in FIG. 2 to reflect light to enlarge and display an image on a screen 6. However, a distorted image is displayed on screen 6.
- the image display device Since the conventional image display device is configured as described above, the image display device There is a limit to the thickness of the device, and there is a problem that it is not possible to further reduce the thickness.
- the present invention has been made to solve the above-described problems, and an image display device capable of displaying an enlarged image without distorting the image and further reducing the thickness compared to the related art is provided. Another object of the present invention is to provide an alignment adjustment method for aligning the optical system components of the image display device. Disclosure of the invention
- An image display device includes: a reflecting unit that reflects an optical image signal; and a refracting optical unit that corrects distortion when the reflecting unit has distortion, and projects the optical image signal to the reflecting unit. And a display means for receiving an optical image signal via the projection optical means.
- the display means can be disposed in the image display device, and an effect that a thinner image display device can be configured as compared with the related art can be obtained.
- An image display device includes: a projection optical unit including a reflection unit having a reflection surface for reflecting an optical image signal and a refraction optical unit having a refraction surface for projecting the optical image signal to the reflection unit.
- the display means receives the optical image signal via the projection optical means, and at least one of the reflection surface and the refraction surface is formed in an aspherical shape.
- the image display device is made thinner and projected onto the display means.
- the effect that the distortion of light can be corrected is obtained.
- An image display device includes: an illumination light source unit that emits illumination light; a reflection type image information receiving unit that receives illumination light emitted from the illumination light source unit, gives image information to the illumination light, and reflects the image information as an optical image signal. And a transmission unit.
- the illumination light source section can be arranged on the reflection surface side of the reflection type image information providing section from which the optical image signal is emitted, and a conventional image display apparatus using a transmissive light spatial modulation element such as a liquid crystal.
- a transmissive light spatial modulation element such as a liquid crystal.
- An image display device includes: an illumination light source unit that emits an illumination light; a reflection type image information receiving unit that receives illumination light emitted from the illumination light source unit, adds image information to the illumination light, and reflects the image information as an optical image signal. And a transmission unit.
- the illumination light source section can be arranged on the reflection surface side of the reflection type image information providing section from which the optical image signal is emitted, and a conventional image display apparatus using a transmissive light spatial modulation element such as a liquid crystal.
- a transmissive light spatial modulation element such as a liquid crystal.
- the image display device is such that the reflection unit includes a rotating aspheric surface that reflects the optical image signal transmitted from the transmission unit.
- the image display device is such that the reflection unit includes a rotating aspheric surface that reflects the optical image signal transmitted from the transmission unit.
- the image display device is configured such that a convex mirror having negative power is used as the reflecting portion.
- the image display device according to the present invention is such that a convex mirror having negative power is used as the reflecting portion.
- the image display device according to the present invention is such that the Fresnel mirror having negative power is used as the reflection section.
- the image can be enlarged without correcting the distortion by the refractive optical section, and the effect of facilitating the design and manufacture of the image display device can be obtained.
- the effect that a thinned image display device can be constituted can be obtained.
- the image display device is configured such that a Fresnel mirror having a negative power is used as the reflecting portion.
- the image can be enlarged without correcting the distortion by the refractive optical section, and the effect of facilitating the design and manufacture of the image display device can be obtained.
- the effect that the image display device can be configured can be obtained.
- the image display device is configured such that the reflection unit is configured by a low dispersion medium and a high dispersion medium stacked in a direction in which the optical image signal transmitted from the transmission unit is transmitted, has a negative power, and has a low dispersion medium. And a reflecting portion provided with a reflecting surface for reflecting the optical image signal transmitted through the high dispersion medium.
- the thickness of the low-dispersion medium or high-dispersion medium can be adjusted to correct the distortion occurring on the reflective surface inside the optical element, and the effect of easily correcting distortion can be obtained.
- the image display device is configured such that the reflection unit is configured by a low dispersion medium and a high dispersion medium stacked in a direction in which the optical image signal transmitted from the transmission unit is transmitted, has a negative power, and has a low dispersion medium. And a reflecting portion provided with a reflecting surface for reflecting the optical image signal transmitted through the high dispersion medium.
- the image display device is such that the reflection portion has a large convex curvature around the optical axis and a reflection surface formed so that the curvature becomes smaller toward the periphery. is there.
- This provides an effect that distortion of light projected onto the display means can be further corrected.
- the image display device is such that the reflection section has a reflection surface formed so as to have a large convex curvature around the optical axis and to decrease the curvature toward the periphery.
- This provides an effect that distortion of light projected onto the display means can be further corrected.
- the image display device is such that the reflection section has an odd-order aspherical reflection surface obtained by adding an odd-order term to a polynomial comprising even-order terms.
- the image display device is such that the reflection section has an odd-order aspherical reflection surface obtained by adding an odd-order term to a polynomial comprising even-order terms.
- the refraction optical unit has an odd-order aspherical refraction surface obtained by adding an odd-order term to a polynomial composed of even-order terms.
- the shape of the refraction surface can be locally changed, distortion can be easily reduced, and the effect of improving off-axis imaging performance can be obtained.
- the refraction optical unit has an odd-order aspherical refraction surface obtained by adding an odd-order term to a polynomial composed of even-order terms.
- the shape of the refraction surface can be locally changed, distortion can be easily reduced, and the effect of improving off-axis imaging performance can be obtained.
- the image display device can be configured such that the reflection section or the refraction optical section guides an optical image signal while avoiding the vicinity of the optical axis of the reflection section or the refraction optical section.
- the image display device is such that the reflection section or the refraction optical section guides an optical image signal while avoiding the vicinity of the optical axis of the reflection section or the refraction optical section.
- the image display device can be configured such that the reflection section or the refraction optical section guides an optical image signal while avoiding the vicinity of the optical axis of the reflection section or the refraction optical section.
- the image display device is such that the reflection section or the refraction optical section guides the optical image signal while avoiding the vicinity of the optical axis of the reflection section or the refraction optical section.
- the refractive optical unit includes a field curvature compensating lens that cancels out the field curvature of the reflecting unit.
- the refractive optical unit includes a field curvature compensating lens that cancels out the field curvature of the reflecting unit.
- An image display device includes: a positive lens having a positive power; and a negative lens having a negative power and a refractive index smaller than the refractive index of the positive lens.
- the refractive optical section is provided with a pupil sum compensating lens for compensating the sum contribution component.
- An image display device includes: a positive lens having a positive power; and a negative lens having a negative power and a refractive index smaller than the refractive index of the positive lens.
- the refractive optical section is provided with a pocket sum compensation lens for compensating the contribution component.
- An image display device includes: a positive lens having a positive power; and a negative lens having a negative power and a refractive index smaller than the refractive index of the positive lens.
- the refractive optical section is provided with a Pettval sum compensation lens for compensating the contribution component.
- the image display device is characterized in that the projection optical means includes an aspherical optical surface at a place where the principal rays of the light image signal projected from the transmission means to the reflection part and / or where the principal rays are collected. It is like that.
- the image display device may be configured such that the projection optical unit includes an aspherical optical surface at a position where the principal ray of the light image signal projected from the transmitting unit to the reflection unit and / or at a position where the principal ray is united. It was done.
- the projection optical unit includes an optical path bending unit that reflects the optical image signal from the refraction optical unit to the reflection unit, and the water including the optical axis of the reflection unit.
- the optical axis direction of the refractive optical section is bent at an appropriate angle in a plane.
- the projection optical unit includes an optical path bending unit that reflects the optical image signal from the refractive optical unit to the reflective unit, and the optical axis of the refractive optical unit in a horizontal plane including the optical axis of the reflective unit. The direction is bent at an appropriate angle.
- the refraction optical unit includes an optical path bending unit that reflects an optical image signal from the first lens unit to the second lens unit.
- the refraction optical unit includes an optical path bending unit that reflects an optical image signal from the first lens unit to the second lens unit.
- At least one lens made of a synthetic resin is included in the refractive optical unit.
- At least one lens made of a synthetic resin is included in the refractive optical unit.
- the image display device is configured such that the optical axis is common, and the refractive optical unit and the reflective unit are configured to be rotationally symmetric.
- the refractive optical portion and the reflecting portion can be easily manufactured by rotational molding, and the effect that the alignment can be easily adjusted is obtained.
- the image display device is configured such that the optical axis is common, and the refractive optical unit and the reflective unit are configured to be rotationally symmetric.
- the refractive optical portion and the reflecting portion can be easily manufactured by rotational molding, and the effect that the alignment can be easily adjusted is obtained.
- An image display device includes a plane mirror that reflects an optical image signal from a projection optical unit to a display unit.
- the image display device can be made thinner by maximizing the space of the image display device.
- An image display device includes a plane mirror that reflects an optical image signal from a projection optical unit to a display unit.
- the image display device can be made thinner by maximizing the space of the image display device.
- the image display device is arranged such that the light receiving surface of the display means and the reflecting surface of the plane mirror are in a parallel relationship.
- the image display device can be configured to be thin.
- the image display device is arranged such that the light receiving surface of the display means and the reflecting surface of the plane mirror are in a parallel relationship. As a result, an effect is obtained that the image display device can be configured to be thin.
- An image display device includes: a retro optical system including a positive lens group having a positive power and a negative lens group having a negative power; and reflection of an optical image signal from the left aperture optical system. And a refractive optical lens for finely adjusting the exit angle to the part.
- An image display device includes: a retro optical system including a positive lens group having a positive power and a negative lens group having a negative power; and reflection of an optical image signal from the left aperture optical system. And a refractive optical lens for finely adjusting the exit angle to the part.
- An image display device is configured such that a lens aperture optical system is configured by two positive lens groups and one negative lens group.
- the thinned image display device can be configured more specifically.
- An image display device is configured such that a retro optical system includes two positive lens groups and one negative lens group.
- the thinned image display device can be configured more specifically.
- An image display device is configured such that a retro optical system includes one positive lens group and one negative lens group.
- An image display device is configured such that a left aperture optical system is configured by one positive lens group and one negative lens group.
- the thinned image display device can be configured more specifically.
- the image display device has a negative lens having an average refractive index of 1.45 or more and 1.722 or less, and having a negative power, and a lens larger than 1.722 and 1.9 or less.
- the positive lens having the average value of the refractive indices described above and having a positive power ratio constitutes a left aperture optical system of the refractive optical section.
- the thinned image display device can be configured more specifically.
- the image display device includes a negative lens having an average refractive index of 1.45 or more and 1.722 or less and having a negative power, and a negative lens having a power larger than 1.722 and 1.9.
- the positive lens having the following average value of the refractive index and having a positive power constitutes a left aperture optical system of the refractive optical section.
- the thinned image display device can be configured more specifically.
- the image display device has an average refractive index of 1.45 or more and 1.722 or less, a negative lens having a negative power, and a negative lens having a refractive power larger than 1.722 and not more than 1.9.
- the positive lens having the average value of the refractive index and having the positive power constitutes the left aperture optical system of the refractive optical section.
- the thinned image display device can be configured more specifically.
- the image display device has a negative lens having an average refractive index of 1.45 or more and 1.722 or less, and having a negative power, and a lens larger than 1.722 and 1.9 or less.
- the refractive-index optical system of the refraction optical unit is composed of a positive lens having an average value of the refractive indexes of the above and having a positive power.
- the image display device has an average refractive index of 1.45 or more and 1.722 or less, a negative lens having a negative power, and a negative lens having a refractive power larger than 1.722 and 1.9.
- the positive lens having the following average value of the refractive index and having a positive power constitutes a left aperture optical system of the refractive optical section.
- the thinned image display device can be configured more specifically.
- the image display device has an average Abbe number of 25 or more and 38 or less, a negative lens having a negative power, and an average value of an Abbe number greater than 38 and 60 or less. And a positive lens having a positive power and a positive aperture optical system of a refracting optical unit.
- the thinned image display device can be configured more specifically.
- the image display device has an average Abbe number of 25 or more and 38 or less, a negative lens having a negative power, and an average value of an Abbe number greater than 38 and 60 or less. And a positive lens having a positive power and a positive aperture optical system of a refracting optical unit.
- the thinned image display device can be configured more specifically.
- the image display device has an average Abbe number of 25 or more and 38 or less, a negative lens having a negative power, and an average value of an Abbe number greater than 38 and 60 or less. And a positive lens having a positive power and a retro optical system of a refraction optical unit.
- the image display device according to the present invention has an average value of Abbe number of 25 or more and 38 or less, and a negative lens having a negative power and an average value of bad number of more than 38 and 60 or less. And a positive lens having a positive power and a refracting optical system of a refracting optical section.
- the thinned image display device can be configured more specifically.
- the image display device has an average value of the Abbe number of 25 or more and 38 or less, and a negative lens having a negative power and an average value of the bad number of more than 38 and 60 or less. And a positive lens having a positive power and a refracting optical system of a refracting optical section.
- the thinned image display device can be configured more specifically.
- the difference between the average value of the refractive index of the glass material forming the positive lens and the average value of the refractive index of the glass material forming the negative lens is 0.04 or more and 1 or less.
- the rear aperture optical system of the optical section is configured.
- the thinned image display device can be configured more specifically.
- the difference between the average value of the refractive index of the glass material forming the positive lens and the average value of the refractive index of the glass material forming the negative lens is 0.04 or more and 1 or less.
- the rear aperture optical system of the optical section is configured.
- the thinned image display device can be configured more specifically.
- the difference between the average value of the refractive index of the glass material forming the positive lens and the average value of the refractive index of the glass material forming the negative lens is 0.04.
- the reticulated optical system of the refracting optical section is constituted by the lens glass material of 1 or less.
- the thinned image display device can be configured more specifically.
- the difference between the average value of the refractive index of the glass material forming the positive lens and the average value of the refractive index of the glass material forming the negative lens is 0.04 or more and 1 or less.
- the rear aperture optical system of the optical section is configured.
- the thinned image display device can be configured more specifically.
- the difference between the average value of the refractive index of the glass material forming the positive lens and the average value of the refractive index of the glass material forming the negative lens is 0.04 or more and 1 or less.
- the rear aperture optical system of the optical section is configured.
- the thinned image display device can be configured more specifically.
- the image display device is a lens glass material in which the difference between the average value of the Abbe number of the glass material forming the positive lens and the average value of the Abbe number of the glass material forming the negative lens is from 0 to 16
- the retro optical system of the section is configured.
- the thinned image display device can be configured more specifically.
- the image display device is characterized in that the difference between the average value of the atlas number of the glass material forming the positive lens and the average value of the Abbe number of the glass material forming the negative lens is from 0 to 16
- the rear aperture optical system of the optical section is configured. As a result, it is possible to obtain an effect that the distortion and the field curvature are suppressed, and the thinned image display device can be configured more specifically.
- the image display device is a refracting optical system for a lens glass material in which the difference between the average value of the Abbe number of the glass material forming the positive lens and the average value of the Abbe number of the glass material forming the negative lens is 0 or more and 16 or less.
- the retro optical system of the section is configured.
- the thinned image display device can be configured more specifically.
- An image display device is a refraction optics lens having a difference between the average value of the Abbe number of the glass material forming the positive lens and the average value of the Abbe number of the glass material forming the negative lens is 0 or more and 16 or less.
- the retro optical system of the section is configured.
- the thinned image display device can be configured more specifically.
- An image display device is a refraction optics lens having a difference between the average value of the Abbe number of the glass material forming the positive lens and the average value of the Abbe number of the glass material forming the negative lens is 0 or more and 16 or less.
- the rear aperture optical system is configured.
- the thinned image display device can be configured more specifically.
- the image display device includes a rear focal length from a lens closest to the transmitting unit light exit surface to a transmitting unit light exit surface among a plurality of lenses constituting the refractive optical unit; The distance from the surface to the entrance pupil position of the refracting optical unit is made to match.
- the image display device includes a rear focal length from a lens closest to the transmitting unit light exit surface to a transmitting unit light exit surface among a plurality of lenses constituting the refractive optical unit; The distance from the surface to the entrance pupil position of the refracting optical unit is made to match.
- the projection optical means includes a negative lens having a negative power at a position where a marginal ray is low.
- the projection optical means includes a negative lens having a negative power at a low marginal ray.
- the bending angle in the optical axis direction is set such that the refractive optical unit approaches the optical path within a range not blocking the optical path from the optical path bending unit to the reflecting unit. .
- the bending angle in the optical axis direction is set such that the refractive optical unit approaches the optical path within a range not blocking the optical path from the optical path bending unit to the reflecting unit. .
- the bending angle in the optical axis direction is set such that the first lens means approaches the optical path within a range not blocking the optical path from the optical path bending means to the second lens means. It is like that.
- the bending angle in the optical axis direction is set such that the first lens means approaches the optical path within a range not blocking the optical path from the optical path bending means to the second lens means. It is like that.
- the image display device is configured such that the shortest distance from the refractive optical section to the reflecting section installation surface is separated within a thickness limit value or less.
- the image display device has a structure in which The shortest distance is set to be less than the thickness limit value.
- the longerest longest distance is equal to the thickness limit value. It is something to do.
- the longerest longest distance is equal to the thickness limit value. It is something to do.
- the image display device may be configured such that the longest distance from the reflection unit installation surface to the optical path bending unit or the longest distance from the reflection unit installation surface to the refractive optical unit is selected.
- the longer maximum distance is set to be the thickness limit and ⁇ .
- the image display device may be configured such that the longest distance from the reflection unit installation surface to the optical path bending unit or the longest distance from the reflection unit installation surface to the refractive optical unit is selected.
- the longer maximum distance equals the thickness limit.
- the image display device is configured such that the longest distance from the reflection unit installation surface to the optical path bending unit is equal to the longest distance from the reflection unit installation surface to the refractive optical unit.
- the image display device is configured such that the longest distance from the reflection unit installation surface to the optical path bending unit is equal to the longest distance from the reflection unit installation surface to the refractive optical unit.
- the image display device is configured such that the longest distance from the reflection unit installation surface to the optical path bending unit is equal to the longest distance from the reflection unit installation surface to the refractive optical unit.
- the image display device is configured such that the longest distance from the reflection unit installation surface to the optical path bending unit is equal to the longest distance from the reflection unit installation surface to the refractive optical unit.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion. This makes it possible to bring the bending optical part closer to the optical path from the optical path bending reflecting mirror to the reflecting part, further satisfy the restrictions on the thickness limit value, and further reduce the height of the screen lower part. The effect that it can be obtained is obtained.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- the bending optical section can be brought closer to the optical path from the optical path bending reflecting mirror to the reflecting section, and the height of the lower portion of the screen can be further reduced by further satisfying the restrictions on the thickness limit value. This has the effect of being able to keep it even lower.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-transmissive portion through which an optical image signal does not pass is deleted from a refractive optical portion.
- An image display device has a shape in which a non-reflection portion that does not reflect an optical image signal to a display means is cut out from a reflection portion.
- An image display device has a shape in which a non-reflection portion that does not reflect an optical image signal to a display means is cut out from a reflection portion.
- An image display device includes a holding mechanism that integrally holds a refractive optical unit and a reflecting unit.
- An image display device includes a holding mechanism that integrally holds a refractive optical unit and a reflecting unit.
- An image display device includes a holding mechanism that integrally holds a refractive optical unit, an optical path bending unit, and a reflecting unit.
- the effect is that it can be performed.
- An image display device includes a holding mechanism that integrally holds a refractive optical unit, an optical path bending unit, and a reflecting unit.
- the effect is that it can be performed.
- An image display device includes a holding mechanism that integrally holds a refractive optical unit, an optical path bending unit, and a reflecting unit.
- the effect is that it can be performed.
- An image display device includes a holding mechanism that integrally holds a refractive optical unit, an optical path bending unit, and a reflecting unit.
- the effect is that it can be performed.
- the refracting optical unit includes a positive lens having a positive power at a high position of a marginal ray. This makes it possible to effectively utilize the lens function to suppress the positive Petzval's sum contribution component of the projection optical system, and to provide an image display device with reduced field curvature.
- the image display device has a positive power at a high marginal ray.
- the refracting optical unit includes a positive lens having a negative refractive index.
- the height of the marginal ray of light incident on the refractive optical unit is hi
- the maximum height of the marginal ray of the positive lens arranged in the center of the refractive optical unit is m
- the refractive optical unit is When the height of the marginal ray of the light emitted from the lens is ho, 1.05 hi, hm, 3 hi, and 0.3 hi ⁇ ho ⁇ lhi are satisfied by the refractive optical section.
- the height of the marginal ray of light incident on the refractive optical section is hi
- the maximum height of the primary ray in the positive lens arranged in the center of the refractive optical section is hm
- the refractive optical section is
- the relationship of 1.05 hi ⁇ hm 3 hi and 0.3 hi ⁇ ho ⁇ lhi is satisfied by the refractive optical part.
- the projection optical means deteriorates the optical performance near the center of the unused optical axis and improves the imaging performance in a range outside the optical axis to be used.
- the projection optical means deteriorates the optical performance near the center of the unused optical axis and improves the imaging performance in a range outside the optical axis to be used.
- the projection optical means is configured such that the imaging position around the optical axis and the imaging position around the optical axis do not exist on the same plane.
- the degree of freedom in designing the refractive optical unit is increased, and an effect is obtained that an image display device having excellent imaging performance can be configured.
- the projection optical means is configured such that the imaging position around the optical axis and the imaging position around the optical axis do not exist on the same plane. is there.
- the degree of freedom in designing the refractive optical unit is increased, and an effect that an image display device having excellent imaging performance can be configured can be obtained.
- the projection optical means allows distortion near the center of the optical axis to improve the imaging performance of most of the parts used.
- the projection optical means allows distortion near the center of the optical axis to improve the imaging performance of most of the parts used.
- the projection optical means allows distortion near the center of the optical axis to improve the imaging performance of most of the parts used.
- the projection optical means allows distortion near the center of the optical axis to improve the imaging performance of most of the parts used.
- the image display device may be such that the projection optical means limits the range in which the optical performance is degraded to the range of the angle of view relating only to the bottom of the screen.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- the image display device may be such that the projection optical means limits the range in which the optical performance is degraded to the range of the angle of view relating only to the bottom of the screen.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- the image display device is such that the projection optical means limits the range in which the optical performance is degraded to the range of the angle of view relating only to the bottom of the screen. It can be limited to the bottom side only, and the other three sides have the effect of forming an image in a correct rectangular shape.
- the screen is connected. This has the effect of preventing overlapping of pictures in parts and gaps between pictures.
- the image display device may be such that the projection optical means limits the range in which the optical performance is degraded to the range of the angle of view relating only to the bottom of the screen.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- the projection optical means limits a range in which the optical performance is deteriorated to a view angle range relating only to the bottom of the screen.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- the image display device is such that the projection optical means limits a range in which the optical performance is deteriorated to a view angle range relating only to the bottom of the screen.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- the image display device is such that the projection optical means limits a range in which the optical performance is deteriorated to a view angle range relating only to the bottom of the screen. is there.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- the projection optical means limits a range in which the optical performance is deteriorated to a view angle range relating only to the bottom of the screen.
- the effect of distortion can be limited only to the bottom side near the center of the optical axis, and the other three sides can form an image in a correct rectangular shape.
- two planes in the vertical direction and multiple planes in the horizontal direction are obtained.
- the effect is obtained that the pictures are not overlapped at the joints of the screens, and the gaps between the pictures do not occur.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display apparatus has a plane mirror for reflecting an optical image signal from a projection optical unit to a display unit in a shape for correcting distortion of the projection optical unit. That's what I did.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit. As a result, an effect is obtained that distortion of the entire image display device can be corrected.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit. -As a result, it is possible to correct the distortion of the entire image display device.
- An image display device is configured such that a plane mirror for reflecting an optical image signal from the projection optical unit to the display unit has a shape for correcting distortion of the projection optical unit.
- the image display device is configured such that a refraction optical unit is configured such that an exit pupil of light emitted toward the vicinity of the optical axis of the reflection unit and an exit pupil of light emitted toward the periphery of the reflection unit are shifted from each other.
- the incident position and the incident angle of the outgoing light are adjusted. As a result, it is possible to suppress the warpage in the peripheral portion of the reflecting portion, and it is possible to obtain an effect that the field curvature can be suppressed.
- the image display device is configured such that a refraction optical unit is configured such that an exit pupil of light emitted toward the vicinity of the optical axis of the reflection unit and an exit pupil of light emitted toward the periphery of the reflection unit are shifted from each other. The incident position and the incident angle of the outgoing light are adjusted.
- the image display device is configured such that the thickness of the reflection portion from the front surface as the reflection surface for reflecting the optical image signal to the rear surface provided on the back surface of the front surface is made equal. It was done.
- the image display device is configured such that the thickness of the reflection portion from the front surface as the reflection surface for reflecting the optical image signal to the rear surface provided on the back surface of the front surface is made equal. It was done.
- the image display device has a flat low-reflection surface provided on a non-projection front surface that does not reflect an optical image signal around the optical axis of the reflection section, and an area smaller than the low-reflection surface.
- the reflection section has a high reflection surface having a planar shape provided around the optical axis inside the low reflection surface.
- the image display device has a flat low-reflection surface provided on a non-projection front surface that does not reflect an optical image signal around the optical axis of the reflection section, and an area smaller than the low-reflection surface.
- the reflection section has a high reflection surface having a planar shape provided around the optical axis inside the low reflection surface.
- a virtual optical axis can be created by the power monitor and arithmetic processing by the detector, and alignment of the reflecting section and the refracting optical section can be easily adjusted in the assembly process of the image display device.
- the effect is that it can be carried out in a short time.
- the image display device has a cover glass for protecting the emission surface of the image information light, and an optical thickness whose dispersion is increased or decreased in accordance with the increase or decrease in the optical thickness of the cover glass.
- the compensating glass is provided in the transmitting means, and the transmitting means emits light to the refractive optical section via the cover glass and the compensating glass.
- the image display device has a cover glass for protecting the exit surface of the image information light, and an optical thickness whose dispersion is increased or decreased in accordance with the variation in the optical thickness of the cover glass.
- the compensating glass is provided in the transmitting means, and the transmitting means emits light to the refractive optical section via the cover glass and the compensating glass.
- the thickness variation of the cover glass is offset, and the emission surface of the transmitting means is always protected by a glass medium having a constant optical thickness. It is possible to use the illumination light source system and the refractive optical unit without changing the design.
- the refraction optical unit includes a compensating glass attaching / detaching mechanism for attaching / detaching the compensating glass on the incident side of the illumination light from the transmitting unit.
- the refraction optical unit includes a compensating glass attaching / detaching mechanism for attaching / detaching the compensating glass on the incident side of the illumination light from the transmitting unit.
- An image display device has a bottom surface orthogonal to a reflecting surface of a plane mirror and a light receiving surface of a display means, is present on a bottom side of a square image displayed on the display means, and is located at the most from the center of the image.
- the constituent elements are arranged in an arrangement space formed by connecting a third projection point projected from the normal direction of the bottom surface to the bottom surface with a line segment.
- An image display device has a bottom surface orthogonal to a reflecting surface of a plane mirror and a light receiving surface of a display means, is present on a bottom side of a square image displayed on the display means, A first point at a distance, a second point on a plane mirror at which light rays directed to the first point are reflected, and a third point at a reflector at which light rays directed at the second point are reflected; A first projection point where the first point is projected from the bottom surface normal direction to the bottom surface, a second projection point where the second point is projected from the bottom surface normal direction to the bottom surface, and a third point
- the constituent elements are arranged in an arrangement space formed by connecting a third projection point projected from the normal direction of the bottom surface to the bottom surface with a line segment.
- An image display device includes: an illumination light source unit that emits illumination light; a color wheel that sequentially colors the light emitted from the illumination light source unit; The main part of the condensing optical system consisting of the evening light and the relay lens that relays the illumination light from the evening light, and the field lens that aligns the direction of the principal ray of the illumination light from the relay lens
- the transmission means is composed of a reflection type image information providing unit that gives image information to the illumination light from the field lens and reflects it as an optical image signal, and a main part of the condensing optical system is arranged as a component in the space.
- a second optical path bending means and a third optical path bending means for sequentially reflecting illumination light from the main part of the condensing optical system to the field lens are provided. It is.
- An image display device includes: an illumination light source unit that emits illumination light; a color wheel that sequentially colors the light emitted from the illumination light source unit; and a uniform illuminance distribution on an emission end face by the illumination light from the illumination light source unit.
- Outgoing aperture Dingtegre A main part of the condensing optical system composed of evening light and a relay lens that relays illumination light from the evening, and a field lens that aligns the principal ray direction of illumination light from the relay lens And a reflection-type image information providing unit that provides image information to the illumination light from the field lens and reflects it as an optical image signal, and a transmission unit is configured.
- a second optical path bending means and a third optical path bending means for sequentially reflecting illumination light from the main part of the condensing optical system to the field lens are provided. It is.
- the optical axis of the main part of the condensing optical system is installed in parallel with the light receiving surface and the bottom surface of the display means.
- the optical axis of the main part of the condensing optical system is installed in parallel with the light receiving surface and the bottom surface of the display means.
- the optical axis of the main part of the condensing optical system is installed in parallel with the light receiving surface of the display means, and the point of intersection between the relay lens and the optical axis is Also, the angle of intersection between the illumination light source unit and the optical axis is inclined so as to be higher in the vertical direction.
- the optical axis of the main part of the condensing optical system is installed in parallel with the light receiving surface of the display means, and the distance between the illumination light source unit and the optical axis is set to be smaller than the intersection of the relay lens and the optical axis. The intersection is inclined so as to be higher in the vertical direction.
- the transmission means includes an adjustment base for installing a main part of the condensing optical system and the field lens, and the adjustment base includes a storage hole for storing the third optical path bending means. Things.
- the transmission means includes an adjustment base for installing a main part of the condensing optical system and the field lens, and the adjustment base includes a storage hole for storing the third optical path bending means. Things.
- At least one optical surface of the second optical path bending unit or the third optical path bending unit has a curved surface shape in a main part of the condensing optical system. .
- At least one optical surface of the second optical path bending unit or the third optical path bending unit has a curved surface shape in a main part of the condensing optical system. .
- the degree of freedom in controlling the light beam can be given by devising the shape of the curved surface, and various optical performances can be improved.
- the image display device according to the present invention is such that the reflection portion is manufactured from a synthetic resin.
- the shape can be easily formed, and mass production can be performed at low cost.
- the image display device according to the present invention is such that the reflection portion is manufactured from a synthetic resin.
- the shape can be easily formed, and mass production can be performed at low cost.
- the non-reflective portion that does not reflect the optical image signal to the display means is cut out of the non-reflective portion so that the front shape seen from the direction of the optical axis is rectangular, and A first screwed portion provided near the optical axis at a predetermined eccentric distance and pivotally fixed to the first reflecting portion mounting mechanism; and a second screwed portion provided on a side other than the lower side of the rectangle.
- the non-reflective portion that does not reflect the optical image signal to the display means is cut out of the non-reflective portion so that the front shape seen from the direction of the optical axis is rectangular, and A first screwed portion provided near the optical axis at a predetermined eccentric distance and pivotally fixed to the first reflecting portion mounting mechanism; and a second screwed portion provided on a side other than the lower side of the rectangle.
- the first reflecting portion mounting mechanism and the first screw portion are screwed by a taper screw, and the taper shape of the taper shape matches the taper portion of the taper screw.
- This has a screw hole. This has the effect that the pivot can be securely fixed.
- the first reflecting portion mounting mechanism and the first screw portion are screwed by a taper screw, and the taper shape of the taper shape matches the taper portion of the taper screw.
- This has a screw hole. This has the effect that the pivot can be securely fixed.
- the image display device includes a non-reflection portion that does not reflect the optical image signal to the display means so that the front shape viewed from the direction of the optical axis is rectangular.
- the reflecting portion is cut off, a concave portion is provided near the optical axis at a predetermined eccentric distance on the lower side of the rectangle, a columnar support that fits the curved surface in the concave portion, and one end is fixed to each of the left and right sides of the concave portion.
- Two springs for applying a pulling force to the reflecting portion a second threaded portion provided on a side other than the lower side of the rectangle and slidingly held with respect to the second reflecting portion mounting mechanism, A third screw portion provided on a side other than the lower side of the rectangle and slide-held with respect to the third reflecting portion mounting mechanism is provided.
- the non-reflective portion that does not reflect the optical image signal to the display means is cut out of the non-reflective portion so that the front shape seen from the direction of the optical axis is rectangular, and A concave portion provided in the vicinity of the optical axis at a predetermined eccentric distance, a cylindrical support for fitting the curved surface to the concave portion, one end of each of which is fixed to the left and right of the concave portion, and applies a pulling force to the reflecting portion
- the non-reflective portion that does not reflect the optical image signal to the display means is cut out of the non-reflective portion so that the front shape seen from the direction of the optical axis is rectangular, and A convex portion provided near the optical axis at a predetermined eccentric distance, and a V-groove support for fitting the convex portion into the V-groove.
- One end is fixed to each of the left and right sides of the convex part, and two springs for applying a pulling force to the reflecting part are provided on the sides other than the lower side of the rectangle.
- a second threaded portion that is slid and held by the second reflector mounting mechanism; and a third threaded portion that is provided on a side other than the lower side of the rectangle and is slidably held by the third reflector mounting mechanism. And a threaded portion.
- the non-reflective portion that does not reflect the optical image signal to the display means is cut out of the non-reflective portion so that the front shape seen from the direction of the optical axis is rectangular, and A convex portion provided in the vicinity of the optical axis at a predetermined eccentric distance, a V-groove support for fitting the convex portion to the V-groove, one end of each of which is fixed to the left and right sides of the convex portion, and Two springs that provide tensile force, and
- a second threaded portion that is slid and held by the second reflector mounting mechanism; and a third threaded portion that is provided on a side other than the lower side of the rectangle and is slidably held by the third reflector mounting mechanism. And a threaded portion.
- the image display device includes two springs, one ends of which are fixed to the left and right sides of the first threaded portion, and the other end is fixed at a common point and applies a pulling force to the reflecting portion.
- the reflection part is provided.
- the stress concentrated on the first screwed portion can be distributed to the spring. Therefore, the reliability of the first threaded portion can be improved.
- the two ends of the first screw portion are fixed to the left and right, respectively, and the other end is fixed at a common point to apply a pulling force to the reflecting portion.
- the reflector is provided with a ring.
- the stress concentrated on the first threaded portion can be dispersed to the spring, and the reliability of the first threaded portion is improved. can do.
- the image display device is characterized in that a first screwed portion, a second screwed portion, and a first reflecting portion attaching mechanism, a second reflecting portion attaching mechanism, and a third reflecting portion attaching mechanism are provided.
- the third screw portion is configured to contactly hold the front surface side of the reflecting portion that reflects the optical image signal.
- the image display device is characterized in that a first screwed portion, a second screwed portion, and a first reflecting portion attaching mechanism, a second reflecting portion attaching mechanism, and a third reflecting portion attaching mechanism are provided.
- the third screw portion is configured to contact and hold the front surface side of the reflecting portion that reflects the optical image signal.
- An image display device is provided on a holding mechanism, and two slide support columns that slide support all the lens groups of the refractive optical unit or a part of the lens group of the refractive optical unit, and two slide support columns.
- the first mounting plate which is located between the slide support columns and is fixed on the holding mechanism, and the entire lens group or a part thereof, which is located between the two slide support columns and constitutes the refractive optical unit Sandwiched between a second mounting plate fixed to the lower part of the lens group, the first mounting plate and the second mounting plate As described above, and a piezoelectric element that expands and contracts in the direction of the optical axis of the refracting optical unit by increasing or decreasing the applied control voltage.
- An image display device is provided on a holding mechanism, and two slide support columns that slide support all the lens groups of the refractive optical unit or a part of the lens group of the refractive optical unit, and two slide support columns.
- the first mounting plate which is located between the slide support columns and is fixed on the holding mechanism, and the entire lens group or a part thereof, which is located between the two slide support columns and constitutes the refractive optical unit
- the second mounting plate fixed to the lower part of the lens group is held in contact with and sandwiched by the first mounting plate and the second mounting plate, and the direction of the optical axis of the refracting optical unit is increased or decreased by an applied control voltage.
- a piezoelectric element that expands and contracts.
- An image display device is provided on a holding mechanism, and moves one of the entire lens group of the reflection unit and the refractive optical unit or the partial lens group of the refractive optical unit in the direction of the optical axis of the refractive optical unit It has a gear support column that is moved by a gear mechanism.
- An image display device is provided on a holding mechanism, and moves one of the entire lens group of the reflection unit and the refractive optical unit or the partial lens group of the refractive optical unit in the direction of the optical axis of the refractive optical unit It has a gear support column that is moved by a gear mechanism.
- An image display device includes a heating / cooling device that heats and cools at least one of the refractive optical unit or the holding mechanism held by the holding mechanism.
- An image display device includes a heating / cooling device that heats and cools at least one of the refractive optical unit or the holding mechanism held by the holding mechanism.
- An image display device includes: a temperature sensor that senses a barrel temperature of a refractive optical unit; a temperature sensor that senses an internal temperature of a holding mechanism; and a focus compensation amount obtained from the barrel temperature and the internal temperature.
- a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device is provided.
- An image display device includes: a temperature sensor that senses a barrel temperature of a refractive optical unit; a temperature sensor that senses an internal temperature of a holding mechanism; and a focus compensation amount obtained from the barrel temperature and the internal temperature.
- a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling unit is provided.
- An image display device includes a temperature sensor for sensing a barrel temperature of a refractive optical unit, and a temperature sensor for sensing an internal temperature of a holding mechanism.
- a control unit that controls at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device according to the focus compensation amount obtained from the lens barrel temperature and the internal temperature is provided.
- An image display device includes: a temperature sensor that senses a barrel temperature of a refractive optical unit; a temperature sensor that senses an internal temperature of a holding mechanism; and a focus compensation amount obtained from the barrel temperature and the internal temperature. It is provided with a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device.
- An image display device includes: a temperature sensor that senses a barrel temperature of a refractive optical unit; a temperature sensor that senses an internal temperature of a holding mechanism; and a focus compensation amount obtained from the barrel temperature and the internal temperature.
- a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device is provided.
- An image display device includes a temperature sensor for sensing a barrel temperature of a refractive optical unit, a temperature sensor for sensing an internal temperature of a holding mechanism, and a focus compensation amount obtained from the barrel temperature and the internal temperature. And a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device.
- An image display device includes a temperature sensor that senses an environmental temperature, and a focus compensation amount obtained by giving the environmental temperature to a linear interpolation formula obtained from at least two or more different focus adjustment points. And a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device.
- An image display device includes a temperature sensor that senses an environmental temperature, and a focus compensation amount obtained by giving the environmental temperature to a linear interpolation formula obtained from at least two or more different focus adjustment points. , A control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device.
- An image display device comprises: a temperature sensor for sensing an environmental temperature; and a focus compensation amount obtained by giving the environmental temperature to a linear interpolation formula obtained from at least two or more different focus adjustment points. And a control unit that controls at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device.
- An image display device includes a temperature sensor that senses an environmental temperature, and a focus compensation amount obtained by giving the above environmental temperature to a linear interpolation formula obtained from at least two or more different focus adjustment points. Therefore, a control unit that controls at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device is provided. As a result, an effect is obtained in which the relationship between the environmental temperature and the focus is made to correspond one-to-one, and more accurate focus adjustment can be performed.
- An image display device includes a temperature sensor for sensing an environmental temperature, and a focus compensation amount obtained by giving the environmental temperature to a linear interpolation formula obtained from at least two or more different focus adjustment points. Accordingly, a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device is provided.
- the image display device includes a temperature sensor for sensing an environmental temperature, and a focus compensation amount obtained by giving the environmental temperature to a linear interpolation formula obtained from at least two or more different bin adjustment points. Accordingly, a control unit for controlling at least one of the piezoelectric element, the gear mechanism, and the heating / cooling device is provided.
- An image display device includes a CCD element that receives light incident on a non-image display area of a display means and detects focus information, and a piezoelectric element and a gear in accordance with a result of analyzing the focus information. And a control unit for controlling at least one of the mechanism and the heating / cooling device.
- An image display device includes: a CCD element that receives light incident on a non-image display area of a display unit and detects focus information; a piezoelectric element based on an analysis result of the focus information; Less of gear mechanism or heating / cooling And a control unit for controlling one of them.
- An image display device includes a CCD element that receives light incident on a non-image display area of a display means and detects focus information, and a piezoelectric element and a gear in accordance with a result of analyzing the focus information.
- a control unit for controlling at least one of the mechanism and the heating / cooling device is provided.
- An image display device includes: a CCD element that receives light incident on a non-image display area of a display unit and detects focus information; a piezoelectric element based on an analysis result of the focus information; It shall be equipped with a control unit and a control unit for controlling at least one of the gear mechanism or the heating and cooling device.
- An image display device includes a CCD element that receives light incident on a non-image display area of a display means and detects focus information, and a piezoelectric element and a gear in accordance with a result of analyzing the focus information.
- the image display device is configured such that light enters the non-image display area of the display means.
- a CCD unit that receives focus light and detects focus information, and a control unit that controls at least one of a piezoelectric element, a gear mechanism, and a heating / cooling device according to the analysis result of the focus information And so on.
- the image display device is provided with a small reflecting mirror for reflecting light incident on the non-image display area of the display means to the CCD element. This has the effect of being able to detect focus information even when the number is limited.
- An image display device includes a small reflecting mirror that reflects light incident on a non-image display area of a display means to a CCD element.
- An image display device includes a small reflecting mirror that reflects light incident on a non-image display area of a display means to a CCD element.
- An image display device includes a small reflecting mirror that reflects light incident on a non-image display area of a display means to a CCD element.
- the image display device is provided with a small reflecting mirror for reflecting light incident on the non-image display area of the display means to the CCD element. This has the effect of being able to detect focus information even when the number is limited.
- the image display device is provided with a small reflecting mirror for reflecting light incident on the non-image display area of the display means to the CCD element. This has the effect of being able to detect focus information even when the number is limited.
- control unit analyzes the beak value of the focus information using the light intensity distribution received by the CCD element as focus information, and performs control so as to increase the beak value. It is the one that was made.
- control unit analyzes the peak value of the focus information using the light intensity distribution received by the CCD element as the focus information, and performs control so as to increase the peak value.
- control unit analyzes a beak value of the focus information using the light intensity distribution received by the CCD element as focus information, and performs control so as to increase the peak value. It was done This has the effect that the focus can be adjusted by directly reflecting the out-of-focus state.
- a control unit analyzes a peak value of focus information using a light intensity distribution received by a CCD element as focus information, and performs control so as to increase the peak value.
- control unit analyzes the peak value of the focus information using the light intensity distribution received by the CCD element as the focus information, and performs control so as to increase the peak value. Is what we did
- the image display device is configured such that the control unit analyzes the peak value of the focus information with the light intensity distribution received by the CCD element as a focus intensity report, and performs control to increase the beak value. It is the one that was made.
- a control unit analyzes a predetermined level width of focus information using a light intensity distribution received by a CCD element as focus information, and reduces the predetermined level width. The control is performed in advance.
- the image display device is arranged such that the control unit analyzes a predetermined level width of the focus information using the light intensity distribution received by the CCD element as focus information, and reduces the predetermined level width. The control is performed.
- the image display device is arranged such that the control unit analyzes a predetermined level width of the focus information using the light intensity distribution received by the CCD element as focus information, and reduces the predetermined level width. The control is performed.
- control unit analyzes a predetermined level width of the focus information using the light intensity distribution received by the CCD element as focus information, and determines the predetermined level width. The control is performed so as to reduce.
- the image display device is arranged such that the control unit analyzes a predetermined level width of the focus information using the light intensity distribution received by the CCD element as focus information, and reduces the predetermined level width. The control is performed.
- An image display device uses a light intensity distribution received by a CCD element as focus information and sets a predetermined level width of the focus information as a control unit.
- the analysis is performed by a computer to control the width of the predetermined level to be small.
- control unit analyzes the inclination of the shoulder portion of the focus information using the light intensity distribution received by the CCD element as focus information, and performs control so as to increase the inclination. This has the effect that the focus can be adjusted by directly reflecting the out-of-focus condition.
- control unit analyzes the inclination of the shoulder of the focus information using the light intensity distribution received by the CCD element as the focus information, and performs control so as to increase the inclination.
- control unit analyzes the inclination of the shoulder portion of the focus information using the light intensity distribution received by the CCD element as focus information, and performs control so as to increase the inclination. This has the effect that the focus can be adjusted directly by reflecting the out of focus.
- the control unit analyzes the inclination of the shoulder portion of the focus information using the light intensity distribution received by the CCD element as focus information, and performs control so as to increase the inclination. Is like This has the effect that the focus can be adjusted by directly reflecting the out of focus.
- control unit analyzes the inclination of the shoulder of the focus information using the light intensity distribution received by the CCD element as the focus information, and performs control so as to increase the inclination. This has the effect that the focus can be adjusted directly reflecting the deviation of the bin.
- the image display device performs control so that the light intensity distribution received by the CCD element is used as focus information, the control unit analyzes the inclination of the shoulder of the focus information, and the inclination is increased. This has the effect that the focus can be adjusted by directly reflecting the out of focus.
- the holding mechanism includes a plurality of support columns that support the refractive optical unit and the reflective unit, respectively, and the product of the vertical height and the linear expansion coefficient is made equal in the support columns. It was made.
- the holding mechanism includes a plurality of supporting columns respectively supporting the refractive optical unit and the reflecting unit, and the product of the vertical height and the linear expansion coefficient is made equal to each other at the supporting columns. It was done.
- the image display device is configured such that the reflection portion includes a reflection convex portion or a reflection concave portion having a high reflection surface and a low reflection surface or an entire surface having a high reflection surface. It is a thing.
- the image display device is such that the reflection portion includes a reflection convex portion or a reflection concave portion having a high reflection surface and a low reflection surface, or a high reflection surface over the entire surface.
- the reflection section includes a lens layer on a front surface as a reflection surface that reflects an optical image signal.
- the reflection section includes a lens layer on a front surface as a reflection surface that reflects an optical image signal.
- An image display device includes: a front housing provided on a bottom surface of a housing and having display means; a rear housing provided on the bottom surface; and a space between the front housing and the rear housing. Provided with an upper slope, a left slope and a right slope, which form a storage space together with the bottom surface. The left slope and the right slope leave a parallel surface parallel to the display means on the back surface of the front housing. At the same time, a vertical surface perpendicular to the display means is left on the side surface of the rear housing.
- the image display devices can be multi-structured with high accuracy, and the effect of improving the installation work efficiency can be obtained.
- the image display device is configured such that a first end surface connected to a parallel surface on one of the left and right sides of the image display device and a vertical surface on the same side as the parallel surface.
- a connection member having a second end face continued and a connection face parallel to the second end face, wherein the connection face is connected to a connection face of another connection member.
- the image display devices housed in the rectangular parallelepiped housing are multi-configured, the image display devices can be accurately multi-configured, and the effect of improving the installation work efficiency can be improved. can get.
- connection member has the same height as the image display device, and is perpendicular to the first end surface and the second end surface, and is connected to another connection member.
- the connection member has a third end face.
- the image display device is configured such that the exhaust / heat exhaust or cables are passed from the inside of the housing to the outside through the left slope and the right slope.
- the image display device can be completely adhered to a wall surface of a room or the like.
- the alignment adjustment method according to the present invention is directed to a method for adjusting the attitude of the reflecting portion while directing the straight traveling light to the reflecting portion, and adjusting the attitude of the reflecting portion so that the straight traveling light incident on the high reflecting surface and the straight traveling light reflected on the high reflecting surface are reflected.
- adjusting the posture of the lens to maximize the power of the rectilinear light in the return path emitted from the refractive optical section.
- the alignment adjusting method according to the present invention is characterized in that the parallel light flux which is perpendicularly incident on the jig display means and transmitted through the first transmission hole is reflected by the high reflection surface, and the parallel light flux between the high reflection surface and the first transmission hole is provided.
- step of matching the forward and return paths of the parallel light beam at, and the parallel light beam centered on the ideal optical axis of the refractive optical section is sequentially reflected from the optical path bending reflector to the high reflection surface, resulting in high reflection
- the parallel light reflected by the perforated mirror and the return light reflected sequentially from the highly reflective surface to the optical path bending reflector Matching the traveling direction of the line light beam, removing the perforated mirror from the lens holding flange and installing the refracting optical unit, installing the illumination light source unit and image information adding unit, Imaging the emitted light as a light image signal by the image information providing unit via the refractive optical unit, the optical path bending reflecting mirror, and the reflecting unit at a regular position on the jig display means; It is provided with.
- FIG. 1 is a diagram showing a configuration of a conventional image display device.
- FIG. 2 is a diagram showing a configuration of a conventional image display device to which a plane mirror is added.
- FIG. 3 is a diagram showing a configuration of an image display device according to Embodiment 1 of the present invention.
- Fig. 4 shows the barrel distortion of the refractive optical lens and the pincushion distortion of the convex mirror. It is a figure which illustrates notionally the operation
- FIG. 5 is a diagram conceptually showing a method of obtaining an image when light is reflected by a convex mirror or a plane mirror via an aberration-free refractive optical lens by optical path tracing.
- FIG. 6 is a diagram showing a configuration of an image display device according to Embodiment 1 of the present invention to which a plane mirror is added.
- FIG. 7 is a diagram showing a configuration of an image display device according to Embodiment 2 of the present invention.
- FIG. 8 is an enlarged view of the convex mirror and the Fresnel mirror.
- FIG. 9 is a diagram comparing the difference in distortion between a convex mirror and a Fresnel mirror.
- FIG. 10 is a diagram showing a configuration of an image display device according to Embodiment 3 of the present invention.
- FIG. 11 is an enlarged view of the optical element.
- FIG. 12 is a diagram showing an incident optical path inside the optical element.
- FIG. 13 is a diagram in which the optical path in the optical element turned back at the reflection surface is developed in one direction.
- FIG. 14 is an enlarged view of the optical element.
- FIG. 15 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention.
- FIG. 16 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention.
- FIG. 17 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention.
- FIG. 18 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention.
- FIG. 19 is a diagram showing a configuration of an image display device according to Embodiment 5 of the present invention.
- FIG. 20 is a diagram showing how the power changes with respect to the ratio of the Abbe numbers of the positive lens and the negative lens.
- FIG. 21 is a view for explaining the under-surface curvature generated by the aspherical convex mirror.
- FIG. 22 is a diagram showing a configuration of an image display device according to Embodiment 6 of the present invention.
- Figure 23 is a diagram in which an aspherical surface is applied to a place where light is gathered and a place where light is paralyzed.
- FIG. 24 is a diagram showing an example of a numerical calculation result of FIG.
- FIG. 25 is a diagram showing a configuration of the image display device according to the embodiment of the present invention.
- FIG. 26 is a diagram for explaining the effect of the image display device of FIG. 25.
- FIG. 27 is a diagram for explaining the effect of the image display device of FIG.
- FIG. 28 is a diagram showing a configuration of an image display device according to Embodiment 8 of the present invention.
- FIG. 29 is a diagram showing the configuration of the left aperture optical system.
- FIG. 30 is a diagram illustrating a numerical value example of Numerical Example 8A.
- FIG. 31 is a diagram showing the configuration of Numerical Example 8A.
- FIG. 32 is a diagram illustrating a numerical value example of Numerical Example 8B.
- FIG. 33 is a diagram showing the configuration of Numerical Example 8B.
- FIG. 34 is a diagram showing a numerical value example of Numerical Example 8C.
- FIG. 35 is a diagram showing the configuration of Numerical Example 8C.
- FIG. 36 is a diagram showing numerical data of Numerical Example 4A.
- FIG. 37 is a diagram showing the configuration of Numerical Example 4A.
- FIG. 38 is a diagram showing numerical data of Numerical Example 4B.
- FIG. 39 is a diagram showing the configuration of Numerical Example 4B.
- FIG. 40 is a diagram showing numerical data of Numerical Example 7A.
- FIG. 41 is a diagram showing a configuration of a numerical example ⁇ A.
- FIG. 42 is a diagram showing a relationship between a rear focal length, an entrance pupil position, and a refractive optical lens.
- FIG. 43 is a diagram showing a configuration of an image display device according to Embodiment 9 of the present invention.
- FIG. 44 is a diagram for explaining an arrangement condition of the optical path bending reflecting mirror.
- FIG. 45 is a view showing a holding mechanism for holding the refractive optical lens, the optical path bending reflecting mirror and the convex mirror.
- FIG. 46 is a diagram for explaining an arrangement condition of the optical path bending reflecting mirror.
- FIG. 47 is a diagram showing a configuration of an image display device according to Embodiment 11 of the present invention.
- FIG. 48 is a diagram showing a numerical example 11A of the eleventh embodiment.
- FIG. 49 is a diagram showing the imaging relationship of a general optical system.
- FIG. 50 is a diagram showing an example of an optical system having a curved image surface.
- FIG. 51 is a diagram showing a configuration of an image display device according to Embodiment 13 of the present invention.
- FIG. 52 is a diagram showing a configuration of an image display device according to Embodiment 14 of the present invention.
- FIG. 53 is a diagram showing an image display device when used in a multi-configuration.
- FIG. 54 is a diagram showing numerical data of a numerical example 14A.
- FIG. 55 is a diagram showing a configuration of a numerical example 14A.
- FIG. 56 is a diagram showing numerical calculation results of distortion in Numerical Example 14A.
- FIG. 57 is a diagram showing a numerical calculation result of distortion in Numerical Example 4A.
- FIG. 58 is a diagram showing a configuration of an image display device according to Embodiment 15 of the present invention.
- FIG. 59 is a view for explaining a shape change in the thickness direction of the convex mirror with respect to a temperature change.
- FIG. 60 is a diagram showing an alignment adjustment method using a convex mirror.
- FIG. 61 is a diagram showing a configuration of an image display device according to Embodiment 16 of the present invention.
- FIG. 62 is a diagram showing the relationship between the thickness of the cover glass and the thickness of the compensation glass.
- FIG. 63 is a diagram showing a numerical value of Numerical Example 16A.
- FIG. 64 is a diagram showing a configuration of a numerical example 16A.
- FIG. 65 is a diagram showing a configuration of an image display device using a plane mirror and an optical path bending reflecting mirror.
- FIG. 66 is a diagram showing a configuration of an image display device according to Embodiment 1 of the present invention.
- Fig. 67 is a diagram showing the cross section of the image display device on the AA 'and BB' planes orthogonal to the screen.
- FIG. 68 is a diagram showing a state of the illumination light source system in which the optical axis is inclined.
- FIG. 69 is a diagram showing various uses of the image display device.
- FIG. 70 is a diagram showing a configuration of an image display device according to Embodiment 17 of the present invention.
- Fig. 71 shows an adjustment table with a storage hole for storing the third optical path bending reflector.
- FIG. 72 is a diagram showing a configuration of an aspheric convex mirror applied to the image display device according to Embodiment 18 of the present invention.
- FIG. 73 is a view for explaining the operation of a convex mirror that thermally expands due to a temperature change.
- FIG. 74 is a view for explaining a shift (6>) of the optical axis when the convex mirror is rotated by an angle of 0 around the first screw portion of the eccentric distance EXC.
- FIG. 75 is a view showing a configuration variation of a convex mirror in which measures against temperature change are taken.
- FIG. 76 is a view showing a configuration variation of a convex mirror for temperature change countermeasures to be applied to an image display device in the case where the image is inverted upside down.
- FIG. 77 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- FIG. 78 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- FIG. 79 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- FIG. 80 is a diagram showing a method of analyzing control unit bint information.
- FIG. 81 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- FIG. 82 is a diagram showing an example in which a part of the refractive optical lens is moved to compensate for a focus shift.
- FIG. 83 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- FIG. 84 is applied to an image display device according to Embodiment 20 of the present invention. It is a figure showing composition of a convex mirror.
- FIG. 85 is a flowchart showing an alignment adjusting method according to Embodiment 20 of the present invention.
- FIG. 86 is a diagram showing how the optical system components are sequentially arranged according to the alignment adjustment method.
- FIG. 87 is a diagram showing how the optical system components are sequentially arranged according to the alignment adjustment method.
- FIG. 88 is a diagram showing a state in which the optical system components are sequentially arranged according to the alignment adjustment method.
- FIG. 89 is a diagram showing a state in which the optical system components are sequentially arranged according to the alignment adjustment method.
- FIG. 90 is a diagram showing how the optical system components are sequentially arranged according to the alignment adjustment method.
- FIG. 91 is a diagram showing a configuration of an image display device according to Embodiment 21 of the present invention.
- FIG. 92 is a diagram showing an overview when the image display device shown in each embodiment is housed in a conventional housing.
- FIG. 93 is a diagram showing an overview of the housing of the image display device according to Embodiment 22 of the present invention.
- FIG. 94 is a diagram showing a case in which two image display devices are multi-configured.
- FIG. 95 is a diagram showing a case in which two image display devices are multi-configured.
- Figure 96 is a diagram showing the case where four image display devices are multi-configured.
- FIG. 3 is a diagram showing a configuration of an image display device according to Embodiment 1 of the present invention.
- 1 1 is a luminous body that emits light (illumination light)
- 1 2 is a parabolic reflector that reflects the light emitted from the luminous body 11 so that it is almost parallel
- 13 is a reflection from the parabolic reflector 1 2 It is a condensing lens for condensing the light.
- the illuminant 11, the parabolic reflector 12 and the condenser lens 13 constitute an illumination light source system (transmitting means, illumination light source section).
- Reference numeral 14 denotes a micromirror device (a transmission means, a reflection type image information adding unit, a digital micromirror device, abbreviated as DMD, Texas Intensuments Incorporated (TI)) which is a reflection type spatial light modulating element.
- the micromirror device 14 spatially modulates the light condensed by the condensing lens 13 with its reflection surface, and converts the intensity-modulated light as an optical image signal given image information. reflect.
- the present invention can be applied to an image display device provided with any kind of spatial light modulating element. Hereinafter, description will be made using the micromirror device 14.
- the projection optical system 17 projects the light spatially modulated by the micromirror device 14 onto the screen 18, and the light intensity modulated by the micromirror device 14 is a refractive optical lens 15. Is projected onto the convex mirror 16 and reflected.
- the reflecting surface of the convex mirror 16 has negative power, and the image of the incident light is enlarged and projected on the screen 18 I do.
- Reference numeral 18 denotes a screen (display means) for receiving the light projected from the projection optical system 17 and displaying an image. The optical path is indicated by an arrow.
- the reflecting surface of the micromirror device 14 and the light receiving surface of the screen 18 are made parallel to each other so that the depth of the image display device is minimized.
- the micromirror device 14 and the screen 18 are arranged so as not to overlap in the height direction so that the projected light is not shaken.
- the projection optical system is designed to maintain the conjugate relationship between the image of the micromirror device 14 and the image of the screen 18 while satisfying the arrangement conditions of the micromirror device 14 and the screen 18 described above. 1 ⁇ is arranged.
- the light output from the light emitter 11 is reflected by the parabolic reflector 12 and enters the reflecting surface of the micromirror device 14 via the condenser lens 13 from an oblique direction.
- the micromirror device 14 spatially modulates the intensity of incident light based on image information.
- the intensity-modulated light is projected on the screen 18 by the projection optical system 17 to display an image.
- the user of the image display device views the image from the left side of the screen 18 in FIG.
- micromirror device 14 will be described.
- the micro mirror device 14 has a reflecting surface in which small mirrors of 16 m square are arranged in a two-dimensional array at a pitch of 17 m, and the small mirror and the image format are used. Usually correspond one to one.
- the inclination of each small mirror can be individually changed by a voltage applied from a controller (not shown), and the direction of the reflected light from each small mirror can be changed accordingly.
- the tilt of the corresponding small mirror is controlled so that the light is reflected in a direction away from the opening of the projection optical system 17. I do.
- the time required to change the tilt of the small mirror is less than 10 sec, and the microphone opening mirror device 14 can modulate the intensity of light at high speed.
- the micromirror device 14 is a reflection-type spatial light modulating element, it is possible to modulate the intensity of light incident from an oblique direction with respect to the reflection surface and reflect the light.
- a liquid crystal is used as the spatial light modulator, light must be incident almost perpendicularly from the back surface of the liquid crystal, so that the thinning of the image display device is restricted by the illumination light source system arranged on the back surface.
- the effectiveness of the micromirror device 14 becomes clear.
- an illumination light source system is arranged on the side where the micromirror device 14 emits light, and the spatial light modulator and the screen are arranged.
- the illumination light source system can be placed between the convex mirrors 16 that bend the optical path to 18 and the space in the height direction of the image display device can be used effectively, preventing the projection of the illumination light source system.
- the projection optical system 17 will be described.
- ′ The light intensity-modulated by the micromirror device 14 is reflected to the projection optical system 17.
- the optical axis of the refractive optical lens 15 is perpendicular to the reflection surface of the micromirror device 14 and the light receiving surface of the screen 18, and the center of the micromirror device 14. And it is installed offset from the center of screen 18. Therefore, only a part of the angle of view of the refractive optical lens 15 is used for projecting light from the micromirror device 14.
- Figure 3 shows the refractive optical lens Since light is incident from below 15, light is emitted upward.
- FIG. 4 is a diagram conceptually illustrating an operation in which barrel distortion of the refractive optical lens 15 corrects pincushion distortion of the convex mirror 16.
- the refractive optical lens 15 is designed to have a Kure type distortion, and emits a light showing a lattice image (FIG. 4 (a)) from the micromirror device 14. When projected onto the refractive optical lens 15, this lattice-like image is deformed into a barrel shape (FIG. 4 (b)).
- the barrel distortion is a characteristic (correction aberration) for correcting the pincushion distortion (FIG. 4 (c)) generated by the convex mirror 16, and is based on the pincushion distortion of the convex mirror 16. It was designed.
- the distortion-corrected light is projected onto the screen 18, the enlarged lattice image (FIG. 4 (d)) is displayed without distortion.
- the distortion is optically corrected. I have to.
- Fig. 5 conceptually shows the method of finding the image when the light from the micromirror device 14 is reflected by the convex mirror 16 or the plane mirror 21 via the aberration-free refractive optical lens 19 by optical path tracing.
- FIG. 5 the optical path reflected by the flat mirror 21 is indicated by a solid line, and the optical path reflected by the convex mirror 16 is indicated by a broken line.
- the refractive optical lens 15 is used so as to have the barrel distortion that corrects the pincushion distortion of the convex mirror 16, so that an image without distortion can be enlarged and displayed on the screen 18.
- the position of the screen 18 with respect to each component of the image display device can be configured to be suitable for thinning.
- the convex mirror 16 can be easily manufactured by a mirror lathe by using a rotating aspheric surface obtained by rotating a quadratic curve around an axis as the shape of the reflecting surface, thereby reducing the manufacturing cost. Can be greatly reduced.
- the convex mirror 16 can be freely designed in accordance with the specifications of the image display device, and the refractive optical lens 15 having a barrel distortion that corrects the pincushion distortion of the designed convex mirror 16 is provided. Just design.
- a means for bending the optical path is required separately from the projection optical system 17 like the plane mirror 7 in FIG. 2, but in the first embodiment, a part of the projection optical system 17 is partially provided. Since it also has the function of bending the optical path, the number of optical components is reduced, and the distance between the screen 18 and the convex mirror 16 can be shortened. Also, as shown in FIG. 6, when the illumination light source system protrudes greatly, a plane mirror 22 that reflects the light from the projection optical system 17 is added, and the optical path to the screen 18 is added. By folding, the space of the image display device can be used to the maximum. It should be noted that the plane mirror 22 and the projection optical system 1 ⁇ ⁇ may be exchanged, and a projection optical system different from the projection optical system 17 may be used instead of the plane mirror 22.
- a transmitting unit configured to include an illumination light source system and a microphone / mirror device 14 and emitting an intensity-modulated optical image signal based on image information;
- a screen 18 that receives a signal and displays an image based on the image information, a convex mirror 16 that has negative power and reflects light intensity-modulated based on the image information to the screen 18, and a convex mirror 16
- the lens has a barrel distortion that corrects the pincushion distortion possessed by the lens, and has a refractive optical lens 15 that is installed so as to project the light from the transmitting means onto the convex mirror 16.
- the light modulated based on the information can correct the pincushion distortion received from the convex mirror 16 and display an enlarged image on the screen 18, making it optimal for thinning the image display device. Place screen 18 in position It is possible to effect that it is possible to construct more image display device thinner than the conventional can be obtained.
- the illumination light source system including the light emitter 11, the parabolic reflector 12 and the condenser lens 13, and the light incident from the illumination light source system are included in the image information.
- the micromirror device 14 that modulates and reflects the light based on the micromirror device 14 constitutes the transmitting means, so that the illumination light source system can be arranged on the side where the micromirror device 14 emits light, Compared to a conventional image display device using a transmissive light spatial modulation element such as a crystal, it is possible to configure an image display device that is thinner. can get.
- the light reflected from the micromirror device 14 is reflected by the projection optical system 17 to the screen 18, so that the optical path for bending the optical path to the screen 18 is changed.
- the effect of reducing the number of optical components and shortening the distance between the screen 18 and the convex mirror 16 can be obtained.
- the convex mirror 16 since the convex mirror 16 has a rotating aspherical shape, it can be easily manufactured by a mirror lathe, and the manufacturing cost can be greatly reduced. The effect is obtained.
- Embodiment 2 since the convex mirror 16 has a rotating aspherical shape, it can be easily manufactured by a mirror lathe, and the manufacturing cost can be greatly reduced. The effect is obtained.
- the projection optical system 17 is configured by the refractive optical lens 15 having the barrel distortion and the convex mirror 16 having the pincushion distortion.
- the projection optical system is constituted by a Fresnel mirror which can enlarge an image at a short projection distance like a convex mirror and has no distortion will be described.
- FIG. 7 is a diagram showing a configuration of an image display device according to Embodiment 2 of the present invention.
- reference numeral 23 denotes an aberration-free refractive optical lens (refractive optical portion)
- reference numeral 24 denotes a Fresnel mirror (reflecting portion) for reflecting light from the refractive optical lens 23 and projecting it on a screen 18.
- Reference numeral 25 denotes a projection optical system (projection optical means) composed of a refractive optical lens 23 and a Fresnel mirror 24.
- the reflection surface of the Fresnel mirror 24 has a negative power.
- the illustration of the illumination light source system is omitted.
- Fig. 8 is an enlarged view of Fresnel Mira 124.
- FIG. 8 also shows the convex mirror 16 shown in the first embodiment.
- Convex mirror 16 in Fig. 8 As in correspondence with Fresnel mirror 24, the Fresnel mirror 24 divides the reflecting surface of the convex mirror 16 into small sections, and has the same inclination as the portion corresponding to the divided position, and has a periodic structure. It has the shape of the reflecting surface. As can be seen from FIG. 8, the Fresnel mirror 24 is thinner than the convex mirror 16.
- FIG. 9 is a diagram comparing the difference in distortion between the convex mirror 16 and the Fresnel mirror 24.
- the grating mirror images (FIGS. 9 (a) and 9 (b)) in the micromirror device 14 and the aberration-free refractive optical lens 23 are reflected by the convex mirror 16 in the optical path.
- (Dashed line in Fig. 9) indicates that the pincushion distortion (Fig. 9 (c), ⁇ ) is perpendicular to the optical axis 27 of the refractive optical lens 23 due to the difference in the reflection position of each optical path due to the convex shape.
- AA occurs on the cross section.
- the image is enlarged at a short distance, and the Fresnel mirror 24 and the aberration-free refractive optical lens 23 that do not distort the image of the transmitted light.
- the projection optical system 25 is configured using the projection optical system 25. Therefore, the image is enlarged and displayed on the screen 18 without correcting the pincushion distortion of the convex mirror 16 of the first embodiment using a refractive optical lens. And the design and manufacture of the image display device can be facilitated.
- the convex mirror 16 is configured to be thinner. Since the Fresnel mirror 24 is used for the projection optical system 25, an effect is obtained that an image display device that is further reduced in thickness as compared with the first embodiment can be obtained.
- Embodiment 3 is described below.
- a projection optical system is configured by an optical element and a refractive optical lens in which the surface opposite to the light incident surface is formed by a convex reflecting surface.
- FIG. 10 is a diagram showing a configuration of an image display device according to Embodiment 3 of the present invention.
- reference numeral 28 denotes a refractive optical lens (refractive optical part),
- Reference numeral 29 denotes an optical element (reflection portion) composed of two optical materials having different dispersion characteristics
- reference numeral 30 denotes a projection optical system (projection optical means) composed of a refractive optical lens 28 and an optical element 29. .
- illustration of the illumination light source system is omitted.
- FIG. 11 is an enlarged view of the optical element 29.
- 3 1 and 3 3 are low dispersion glass (low dispersion medium), high dispersion glass (high dispersion medium), 3 2 is the interface between low dispersion glass 3 1 and high dispersion glass 3 3, 3 4 is high dispersion It is a reflection surface that serves as a boundary between glass 33 and air. When viewed from the light incident side, the boundary surface
- the reflecting surface 34 has a convex shape so as to have a negative power. Similar to the principle of the prism, since chromatic aberration occurs when light enters and exits the optical element 29, achromatization is performed by combining the low dispersion glass 31 and the high dispersion glass 33.
- FIG. 12 is a diagram showing an incident optical path inside the optical element 29.
- the left side of the interface 3 2 has a low dispersion glass 3 1 (refractive index nx ), the right side corresponds to the high dispersion glass 3 3 (refractive index n 2 ).
- ! ! ⁇ n 2 can be selected arbitrarily, but here it is nir ⁇ .
- a convex mirror having the same shape as the reflecting surface 34 is prepared, and the optical path obtained by simply bending the incident light using the convex mirror as the reflecting surface 34 is indicated by a broken line.
- the structure is such that the light passes through the low-dispersion glass 31 and the high-dispersion glass 33 in order and enters the convex reflecting surface 34 from the optical path when bent by a simple convex mirror.
- the optical path formed by the optical element 29 can be bent at a larger angle, and a wider-angle image can be projected on the screen 18.
- the convex shape of the reflecting surface 34 can be made gentler than that of the convex mirror 16 of the first embodiment by an amount capable of projecting an image at a wider angle. 4.
- the pincushion distortion can be reduced.
- the thickness of the optical material of the low-dispersion glass 31 and the high-dispersion glass 33 the light emission position can be controlled. Can be corrected inside.
- FIG. 13 is a diagram in which the optical path in the optical element 29 turned back at the reflection surface 34 is developed in one direction.
- the red and blue light paths are indicated by solid lines and broken lines, respectively.
- the case where the refractive index change with respect to the wavelength difference is large is called high dispersion, and the case where it is small is called low dispersion.
- a glass material has a characteristic that the refractive index increases as the wavelength decreases.
- the low-dispersion glass 31 is arranged on the light incident side in FIG. 11, but the high-dispersion glass 36 is used on the light incident side as shown in FIG. 8.
- the optical element 35 using the configuration of the reflection surface 39 having a negative power can provide a higher achromatizing effect. These can be freely selected at the time of design.
- the low-dispersion glass is composed of the low-dispersion glass 31 and the high-dispersion glass 33 stacked in the light transmitting direction, and has a negative power. Since the light is projected onto the screen 18 by using the optical element 29 formed with the reflecting surface 34 that reflects the light transmitted through the high dispersion glass 31 and the high dispersion glass 33, the convex mirror according to the first embodiment is used. The light with the same wide angle as that of 16 can be projected with a gentler convex shape, and the thickness of the low-dispersion glass 31 and the high-dispersion glass 33 can be adjusted to reduce the distortion caused by the reflective surface 34. Correction can be performed inside the components 9 and 35, and the effect of facilitating the correction of the pincushion distortion generated on the reflecting surface 34 can be obtained.o Embodiment 4.
- FIG. 15 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention.
- reference numeral 40 denotes a refractive optical lens having a positive power (projection optical means, refractive optical section), and 41 denotes an aspheric convex mirror having an aspherical reflective surface (projection optical means, reflective section).
- Aspherical lens projection optical means, refraction optics
- 43 a spherical convex mirror (projection optical means, reflection part) having a spherical reflecting surface
- 44 a refractive optical lens 40, aspherical convex mirror 41, This is the optical axis shared by the aspheric lens 42 and the spherical convex mirror 43.
- the illumination light source system and screen are not shown.Analysis based on the principle of Ferma shows that no aberration can be obtained if the refractive surface of the lens or the reflecting surface of the mirror is spherical.
- the aberration can be reduced by making the refracting surface of the lens / the reflecting surface of the mirror an aspherical shape.
- the distortion is corrected by applying the optical element having the aspherical shape to a place where the principal ray is separated.
- FIG. 15 (a) For example, as shown in FIG. 15 (a), light from a micromirror device 14 as a spatial light modulating element is reflected by an aspheric convex mirror 41 through a refractive optical lens 40, and is not shown. Light is projected on screen 18.
- an aspheric lens 42 is installed at a position where the principal ray between the refracting optical lens 40 and the spherical convex mirror 43 is separated, and the microphone aperture mirror is set.
- the light from one device 14 is reflected by a convex convex mirror 43 via a refracting optical lens 40 and an aspheric lens 42, and the light is projected on a screen 18.
- the shape of the reflective surface of the aspheric convex mirror 41 and the shape of the refractive surface of the aspheric lens 42 correspond one-to-one with the distortion, the shape is designed by optical path tracing to reduce the distortion in any case. are doing.
- both the aspherical lens 42 and the aspherical convex mirror 41 may be provided. This makes it possible to roughly and easily correct the distortion.
- the number of the aspherical lens 42 is not limited to one, and a plurality of aspherical lenses 42 are provided between the refractive optical lens 40 and the aspherical convex mirror 41 (or the spherical convex mirror 43).
- the aspherical lens 42 may be provided, and the distortion can be further corrected.
- FIG. 16 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention. Illustration of the illumination light source system and screen is omitted.
- reference numeral 45 denotes an aspheric convex mirror (projection optical means, reflecting section) having a reflective surface having a large convex curvature at the center of the optical axis 44 and having a small curvature toward the periphery. is there.
- the spherical convex mirror 43 (dotted line) and the light reflected by the spherical convex mirror 43 (dotted arrow) are shown.
- the spherical convex mirror 43 causes pincushion distortion and causes image distortion. Since this pincushion distortion occurs in the peripheral shape of the spherical convex mirror 43, the reflective aspheric convex mirror 45 having a large convex curvature at the center of the optical axis 44 and having a small curvature toward the periphery is formed. This is used to correct the peripheral shape of the spherical convex mirror 43. Thereby, distortion can be further reduced.
- FIG. 17 is a diagram showing a configuration of an image display device according to Embodiment 4 of the present invention. Illustration of the illumination light source system and screen is omitted.
- reference numeral 46 denotes an aspheric convex mirror having an odd-order aspheric surface as a reflecting surface (projection optics). Means, reflector).
- a three-dimensional surface is represented by a polynomial composed of even-order terms.
- An odd-order aspheric surface of the aspheric convex mirror 46 in FIG. 17 is formed by adding an odd-order term to this polynomial and setting each aspheric coefficient to an appropriate value.
- the odd-order aspheric surface of the aspheric convex mirror 46 has a convex projection (or a concave depression) near the optical axis 44. It can be seen from FIG.
- the convex protrusion (or concave depression) near the optical axis 44 is formed by adding odd-order terms.
- the micromirror device 14 When the optical axis 44 is eccentrically arranged outside the optical axis 44, light is not projected by the reflection surface near the optical axis 44. Therefore, even if the projection imaging performance near the optical axis is degraded due to the curvature discontinuity at the center of the aspheric convex mirror 46, there is no problem in the display performance.
- the aspheric convex mirror 46 it is possible to realize a projection optical system that achieves both correction of distortion and good imaging characteristics of off-axis projection light.
- the center of the odd-order aspherical mirror and aspherical lens including the first-order odd-order terms, has discontinuities in curvature, which causes reflected light and refracted light to be disturbed, resulting in poor imaging performance.
- the micromirror device 14 is eccentrically arranged with the effective display surface shifted off the optical axis.
- Odd-order aspheric surfaces can also be applied to refractive optical lenses.
- FIG. 18 shows a configuration of an image display apparatus according to Embodiment 4 of the present invention.
- reference numeral 47 denotes an aspheric lens (projection optical means, refractive optical section) in which the refractive surface facing the aspheric convex mirror 45 is formed as an odd-order aspheric surface.
- the shape of this exit portion is locally changed, and the shape is reduced so as to reduce distortion. Can be controlled.
- the aspherical convex mirror 41 having the aspherical reflecting surface is provided, the distortion of the light projected on the screen 18 can be corrected. The effect that it can be obtained is obtained.
- At least one aspherical refracting surface having at least one aspherical refracting surface is provided between the refracting optical lens 40 and the convex mirror at a position separated by a chief ray. Since this is provided, it is possible to obtain an effect that distortion of light projected on the screen 18 can be corrected.
- the aspheric convex mirror 45 having a large convex curvature at the center of the optical axis and having a small curvature toward the periphery is provided.
- the effect that the distortion of the image can be further corrected can be obtained.
- an aspheric convex mirror having an odd-order aspherical surface formed as a reflection surface by adding an odd-order term to an even-order polynomial representing an even-order aspherical surface 46 Therefore, there is obtained an effect that it is possible to realize a projection optical system that achieves both correction of distortion and good imaging characteristics of off-axis projection light.
- an aspheric lens having an odd-order aspherical surface formed as a refraction surface by adding an odd-order term to an even-order polynomial representing an even-order aspherical surface can be locally changed, distortion can be easily reduced, and further off-axis imaging performance is improved. Is obtained.
- Each shape applied to the refractive optical lens and the convex mirror can be arbitrarily selected when designing the image display device, and an appropriate combination may be selected.
- a part of the refractive optical unit such as the refractive optical lens 40, the aspherical lens 42, and the aspherical lens 47, that is, at least one refractive optical lens constituting the refractive optical unit is made of, for example, polycarbonate,
- plastic synthetic resin represented by acrylic or the like By subjecting plastic synthetic resin represented by acrylic or the like to injection molding, it can be mass-produced from a mold having a desired non-spherical shape.
- the melting point of glass used as the lens material is about 700 ° C
- the melting point of glass for molding is 500 ° C
- plastic synthetic resin has a lower melting point than these materials, and it is refracted.
- the aspheric lenses 42, 47 and the like by molding by a known glass molding method.
- the aspherical lens is made of a glass material, the environmental characteristics (operating temperature range, humidity range, etc.) can be improved as compared with the case where the aspherical lens is manufactured using a plastic material.
- the selection of the lens material for the refractive optical section may be determined according to the purpose, use, and specifications of the image display device, taking advantage of the respective materials.
- the distortion is corrected by using an aspheric convex mirror having an aspherical reflecting surface or a refractive optical lens having an aspherical refracting surface.
- the image projected on the screen 18 has a curvature of field, which causes a so-called out-of-focus phenomenon.
- Embodiment 5 Now, a method for reducing field curvature will be described.
- ⁇ is an operator representing the sum of exponents i
- i is the optical element number
- N is the optical
- P i is the Petzval sum contribution component of the i-th optical element
- ni is the refractive index of the i-th optical element
- fi is the focal length of the i-th optical element
- ⁇ i is the i-th optical element. It shows the power of the element.
- the refractive optical lens 48 is an achromatic lens composed of a positive lens 48A and a negative lens 48B.
- the field curvature is corrected by designing the refractive optical lens 48 to cancel the contribution component P3 of the aspheric convex mirror 41. That is, positive
- the component P 1 + P 2 is set to a negative value so as to cancel the component P 3 of the aspheric convex mirror 41.
- the positive lens 48 A has a positive power 1 1 (> 0)
- the negative lens 48 has a negative power 2 ( ⁇ 0)
- the Abbe number 1 of the positive lens 48 8 and the Abbe number 2 of the negative lens 48 8 are set close to each other, it is possible to further satisfy the Petzval condition.
- the Abbe number is defined as: ( ⁇ -1) / A n (n is the refractive index). Means material.
- Equations (2) and (3) are replaced by equations (4) and (4). 5), and the absolute values of (01 / ⁇ ) and (2 / ⁇ ) with respect to (So2No1) The child is shown in FIG.
- the powers of the positive lens 48A and the negative lens 48B constituting the refractive optical lens 48 can be increased to further satisfy the ⁇ bar condition.
- the refractive index n1 of the positive lens 48A is increased and the refractive index n2 of the negative lens 48B is reduced, so that the Abbe number 1 of the positive lens 48A and the Abbe number 2 of the negative lens 48B are Set so that is close.
- the refractive index of the positive lens 48 is increased and the refractive index of the negative lens 48B is reduced so as to approach the ⁇ ⁇ ⁇ bar condition.
- n 1 1 • 8
- n 2 1.6
- the refractive index of the positive lens 48 A is larger than that of the negative lens 48 B
- the positive lens 48 is composed of the positive lens 48 having a positive power and the negative lens 48 is having a negative power. Distortion is compensated for by providing a refractive optical lens 48 that is larger than the refractive index of the lens 48B and that sets the Abbe number of the positive lens 48A and the Abbe number of the negative lens 48B close to each other. At the same time, the curvature of field can be compensated so as to satisfy the Petzval condition, and the effect of improving the imaging performance can be obtained.
- Embodiment 5 is not limited to this. It is also possible to apply to the other configurations shown. Embodiment 6.
- the field curvature generated by the aspheric convex mirror is compensated.
- a method for generating a large curvature of field with a refractive optical lens will be described.
- FIG. 21 is a view for explaining the under-surface curvature generated by the aspherical convex mirror.
- reference numeral 49 denotes a refractive optical lens
- 50 denotes an optical axis of the refractive optical lens 49
- 51 denotes a plane perpendicular to the optical axis 50.
- the light transmitted through the refractive optical lens 49 forms an image on the plane 51, and a flat image is obtained in FIG. 21 (a).
- the best image surface When light is projected through the refractive optical lens 49 onto the aspherical convex mirror according to the fourth embodiment, the best image surface has a concave surface on the side of the projection optical system due to the under-surface curvature generated by the aspherical convex mirror. It becomes a curved surface aimed at.
- the distance from the optical axis 44 to the focal point increases as the distance from the optical axis 44 increases.
- the refractive optical lens projection optical means, refractive optical unit, field curvature compensating lens
- the refractive optical lens 54 provides between the lens, and the excessive field curvature of the refractive optical lens 54 and the aspheric convex mirror 41 —This offsets the curvature of field. By doing so, it is possible to correct the under-surface curvature of the aspheric convex mirror 41 used to correct the distortion, and to have no distortion and no field curvature. Images can be displayed.
- the shape of the refractive surface of the refractive optical lens 54 is determined by the number of optical path tracings using a computer.
- the optimum refractive surface shape can be determined by the value calculation.
- Fig. 23 shows the results of numerical calculation of optical path tracing.
- An aspheric lens projection optics, refracting optics, aspherical optics) 5
- Aspherical lens projection optical means, refraction optics, aspherical optical element
- An aspherical convex mirror projection optical means, reflecting section, aspherical optical element
- the aspheric lens 55 can effectively reduce the field curvature, and the aspheric lenses 56 A and 56 B and the aspheric convex mirror 57 can effectively reduce distortion.
- FIG. 24 shows an example of the numerical calculation results of FIG. Equations for defining the aspherical shape used in FIG. 24 are as shown in equations (6) and (7).
- z is the amount of sag from the tangent plane passing through the center of rotation of the optical surface
- c is the curvature at the surface vertex (reciprocal of the radius of curvature)
- k is the conic coefficient
- r is the distance from the z-axis.
- f 5.57 mm (focal length at 546.1 nm wavelength)
- NA 0.17 (micromirror device side numerical aperture)
- Y 0 b 1 22 mm (micromirror-device-side object height)
- M 86.3 X (projection magnification).
- the refractive optical lens 54 generates an over-uniform curvature of field which cancels out the under-uniform curvature of field of the aspherical convex mirror 41. The effect is obtained that an image in which the aberration is corrected and the field curvature is corrected can be displayed.
- the aspherical optical surface is applied to the place where the chief ray is scattered and the place where the chief ray is collected. The effect is obtained that the curvature can be effectively reduced where the chief ray is distorted.
- the refractive optical lens 54 may be applied to the other aspheric convex mirror described in the fourth embodiment, and the same effect is obtained.
- Embodiment ⁇ Embodiment ⁇ .
- FIG. 25 is a diagram showing a configuration of an image display device according to Embodiment 7 of the present invention.
- FIGS. 25 (a), (b) and (c) are a front view, a top view and a side view of the image display device, respectively.
- reference numeral 58 denotes a refractive optical lens (projection optical means, refractive optical unit) that transmits light from the micro mirror device 14, and corresponds to the refractive optical lens described in each embodiment.
- Reference numeral 59 denotes an optical path bending reflecting mirror (optical path bending means) for reflecting light from the refractive optical lens 58, and 60 denotes a convex mirror having negative power (projection optical means, reflecting section).
- FIG. 6 1 is the optical axis of the convex mirror 60.
- FIG. 25 the illustration of the illumination light source system is omitted.
- the refractive optical lens 58 and the convex mirror 60 shown in FIG. 25 are manufactured with a common optical axis, and an optical path bending reflecting mirror 59 must be used to obtain the arrangement shown in FIG.
- the optical axis direction of the refractive optical lens 58 is bent at an appropriate angle in the horizontal plane including the optical axis 61 of the convex mirror 60.
- the optical axis of the refractive optical lens 58 is appropriately adjusted around the normal to the horizontal plane including the optical axis 61 of the convex mirror 60. Rotating until the bearing.
- the refractive optical lens 58 is arranged in the empty space of the image display device.
- the light from the micromirror device 14 transmitted through the refractive optical lens 58 is first reflected by the optical path bending reflecting mirror 59 to the convex mirror 60 side, and the reflected light is reflected by the convex mirror 60.
- the light reflected by the convex mirror 60 is reflected by the plane mirror 22 described in the first embodiment, and is projected onto the screen 18 at a wide angle.
- the thinnest image display device can be configured.
- Embodiment 7 The point of Embodiment 7 is that the light from the bending optical lens 58 arranged in the empty space of the image display device is reflected by the optical path bending reflecting mirror 59 to the convex mirror 60. is there. Since the refractive optical lens 58 and an unillustrated illumination light source system can be arranged in the empty space, the thickness of the image display device can be reduced.
- the optical path bending reflecting mirror 59 since the optical path bending reflecting mirror 59 is not provided, the light transmitted through the refracting optical lens 58 is directly emitted to the convex mirror 60, and the screen 18, the plane mirror 22 and the convex mirror It becomes necessary to dispose the micro mirror device 14, the refractive optical lens 58, and the like at a position determined from 60, so that the image display device is configured to be thicker than the image display device of FIG.
- the optical path bending reflecting mirror 59 although the optical path bending reflecting mirror 59 is provided, the optical axis direction of the refracting optical lens 58 is set in a plane other than the horizontal plane including the optical axis of the convex mirror 60 (in FIG. (In the vertical plane), the refractive optical lens 58, the micromirror device 14, the illumination light source system (not shown), etc. are arranged below the convex mirror 60.
- the lower part of the screen is configured to be higher than the image display device.
- an optical path bending reflecting mirror may be used for a refractive optical lens (projection optical means, refractive optical section) composed of a plurality of lenses. That is, an optical path bending reflector is inserted between the first lens means and the second lens means of the plurality of lenses constituting the refractive optical lens, and the two lenses are reflected by the optical path bending reflector. To transmit light between them.
- the first lens means and the second lens means are a lens group composed of at least one refractive optical lens. In this case, since it is not necessary to configure the optical axis of the first lens means and the optical axis of the second lens means coaxially, it is possible to configure a refractive optical lens by bending the two optical axes. become able to. Even in this case, similarly to FIG. 25, the thickness of the image display device can be reduced.
- a plurality of optical path bending reflecting mirrors may be used according to the number of lenses.
- an optical path bending reflecting mirror that reflects light from a refractive optical lens to a convex mirror and an optical path bending reflecting mirror that reflects light from any lens of the refractive optical lens to another lens may be used in combination.
- the refractive optical lens 58 is bent at an appropriate angle in the horizontal plane including the optical axis 61 of the convex mirror 60, and the refractive optical lens 58 is formed. Since the light path bending reflecting mirror 59 for reflecting the emitted light to the convex mirror 60 is provided, the refractive optical lens 58 and the illumination light source system can be arranged in the empty space of the image display device. The effect is obtained that the image display device can be further reduced in thickness and the height of the lower portion of the screen can be kept low.
- the seventh embodiment since the optical path bending reflecting mirror for reflecting the light from the first lens means constituting the refractive optical lens to the second lens means is provided, the first By bending the optical axis of the lens means and the optical axis of the second lens means, a refractive optical lens can be formed. Therefore, an effect that an image display device in which the height of the lower part of the screen is kept low can be obtained.
- Embodiment 2 can be applied to Embodiments 1 to 6.
- Embodiment 8
- Embodiment 8 discloses the result of this numerical calculation.
- FIG. 28 is a diagram showing a configuration of an image display device according to Embodiment 8 of the present invention, and uses Numerical Example 6A (FIG. 23).
- Reference numeral 14 which is the same as in FIG. 3 is a micromirror device.
- 62 is Retro optics (projection optics, refraction optics) composed of a positive lens group with positive power and a negative lens group with negative power.
- 63 is a refractive optical lens that fine-tunes the light emission angle.
- projection optical means, refraction optical section and 64 are aspherical convex mirrors (projection optical means, reflection section) that reflect light from the refraction optical lens and correct distortion. The illustration of the illumination light source section and the screen is omitted.
- the aperture optical system 62 and the refractive optical lens 63 include the various refractive optical lenses described in the embodiments.
- FIG. 29 (a) More specifically, from the two positive lens groups 62A and 62B and one negative lens group 62C in FIG. 29 (a), the two positive lens groups in FIG. 29 (b) 6 2 D, 6 2 E and one negative lens group 6 2 F, and from FIG. 29 (c) one positive lens group 62 G and one negative lens group 62 H, retro optics 6 The two make up each.
- the above configuration is a configuration derived by numerical calculation in order to achieve the object of the present invention.
- the effect of suppressing distortion and field curvature and configuring a thin image display device is as follows. You can easily understand by performing the numerical calculation again using the numerical calculation result shown in the example. Specific numerical calculation results are shown as Numerical Examples 8A, 8B, and 8C. ⁇ Numerical example 8A>
- FIG. 29 corresponds to FIG. 29 (a).
- the positive lens group 62B is an achromatic lens composed of a positive lens and a negative lens.
- Fig. 32 and Fig. 33 show the numerical data and configuration of numerical example 8B.
- FIG. 29 corresponds to FIG. 29 (b).
- the positive lens group 62E includes one lens.
- Fig. 34 and Fig. 35 show the numerical data and configuration of Numerical Example 8C, respectively, and correspond to Fig. 29 (c).
- FIGS. 36 to 39 show numerical examples 4A and 4B relating to the fourth embodiment
- FIGS. 40 and 41 show numerical examples 7A relating to the seventh embodiment. I will disclose each one.
- Fig. 36 and Fig. 37 show the numerical data and configuration of Numerical Example 4A, respectively.
- Figs. 38 and 39 show the numerical data of Numerical Example 4B. It is a figure which shows a structure each. Each of them corresponds to the fourth embodiment.
- the two aspherical lenses 47 the one near the aspherical convex mirror 46 is manufactured by an acrylic, and the one farther away is manufactured by a polycarbonate.
- the temperature coefficient of refractive index and the coefficient of linear expansion of plastics are about two orders of magnitude larger than those of glass, so special considerations are required when using them in environments with large temperature changes. Therefore, in Numerical Example 4B, in particular, in the shape of the two aspheric lenses 47, the thickness of the central portion and the thickness of the peripheral portion are almost equal, and the shape of the aspheric lens 47 with respect to the temperature change is obtained. Environmental impact is improved by reducing the effects of environmental changes.
- FIG. 40 and FIG. 41 are diagrams each showing a numerical data configuration of Numerical Example 7A. This corresponds to the seventh embodiment, and corresponds to the case where the optical path bending reflecting mirror is inserted at the bending position in the figure to reduce the thickness of the image display device.
- the specifications and the aspherical surface calculation formulas for all the numerical examples described above are the same as those in the numerical example 6A except for the value of the focal length f at a wavelength of 546.1 nm.
- the focal length of each numerical example: f is as follows.
- the features 1 and 2 are that the refractive index of the positive lens 48 ° is increased and the refractive index 48B of the negative lens is reduced in the refractive optical lens 48 (Pppl sum compensation lens) described in the fifth embodiment. It is equivalent to doing. Further, generally, the number of keys is 70 to 90 for applications such as achromatization, but as can be seen from the feature 2, the Abbe number is 60 or less.
- the micromirror device is eccentrically arranged outside the common optical axis of the projection optical system, and the light is obliquely incident on the optical system. Care must be taken not to reduce the effective luminous flux.
- the eighth embodiment in order to eliminate this light jolt, the configuration is as shown in FIG.
- the back focal length (Backfocallength: English, BFL), which is the distance from the lens closest to the micromirror device 14 to the micromirror device 14 (transmitting means light emission surface).
- BFL Backfocallength: English, BFL
- the distance from the micromirror device 14 to the entrance pupil position of the retro optical system 62 is made to match. In this way, light shading can be minimized and the efficiency of lighting the screen can be increased. The reason will be described below.
- the main beams reflected from the small mirrors of the micromirror device 14 converge at the entrance pupil position. Since the divergence angle of the reflected light from each small mirror is constant, when the entrance pupil position coincides with the BFL as shown in Fig. 42 (a), the light beam should be concentrated most at the BFL position. Therefore, the size (diameter) of the refractive optical lens 66 arranged on the BFL can be minimized. At this time, light from an illumination light source system (not shown) is —The refractive optical lens 65 that mediates to the device 14 does not block light from the micromirror device 14 to the refractive optical lens 66.
- the size and arrangement of the refractive optical lenses 65 and 66 and the micromirror device 14 are kept, and the entrance pupil position is shifted from the BFL. If this is done, the chief rays from the small mirrors will converge at the shifted entrance pupil position, and since the spread angle of the light is constant, the light rays at the BFL position will spread compared to Fig. 42 (a), and this light The lens diameter for receiving light increases. Further, the light incident on the refractive optical lens 66 from the micromirror device 14 is rejected by the refractive optical lens 65. This leads to a reduction in the effective luminous flux, which degrades lighting efficiency.
- the distance from the micromirror device 14 to the entrance pupil position is set to be equal to the BFL, thereby minimizing the size (diameter) of the refractive optical lens. At the same time, it is possible to reduce blurring of light and improve lighting efficiency.
- the technique for minimizing the irrelevant effect shown here can also be applied to other embodiments.
- the position of the entrance pupil almost coincides with B FL, but the best effect can be obtained by making them completely coincident.
- the lens aperture optical system 62 composed of the positive lens group and the negative lens group, and the refractive optical lens 63 that finely adjusts the light emission angle are provided.
- the provision of the aspherical convex mirror 64 for correcting the distortion can suppress the distortion and the curvature of field and provide an effect that a thinner image display device can be configured.
- retro-light beams are transmitted from the positive lens group 62 A (62D), the positive lens group 62 B (62E), and the negative lens group 62C (62F). Since the optical system 62 is configured, it is possible to obtain the effect of suppressing distortion and curvature of field and more specifically configuring a thin image display device.
- the retro optical system 62 is constituted by the positive lens group 62G and the negative lens group 62H, so that distortion and field curvature are suppressed, and
- the advantage is that the image display device can be configured more specifically.
- the average value of the refractive index of the negative lens is in the range of 1.45 to 1.722, and the average value of the refractive index of the positive lens is larger than 1.722. Since it is within the range of 0.9 or less, it is possible to obtain the effect of suppressing distortion and curvature of field and more specifically configuring a thin image display device.
- the average value of the number of the glass materials constituting the negative lens is set to 25 or more and 38 or less, and the average value of the number of the glass materials constituting the positive lens is set to more than 38. Since it is largely 60 or less, it is possible to obtain the effect of suppressing distortion and curvature of field and more specifically configuring a thin image display device.
- the difference between the average value of the refractive index of the glass material forming the positive lens and the average value of the refractive index of the glass material forming the negative lens is 0.04 or more and 1 or less. Since the refracting optical lens is formed from the above, it is possible to obtain an effect that distortion and curvature of field are suppressed, and a thinner image display device can be more specifically configured.
- the difference between the average value of the Abbe number of the glass material forming the positive lens and the average value of the Abbe number of the glass material forming the negative lens is from 0 to 16 Since a refractive optical lens is configured, distortion and curvature of field are suppressed, and a thinner image display device is realized. The effect that it can be constructed physically can be obtained.
- the BFL from the refractive optical lens closest to the micromirror device 14 to the micromirror device 14, and the my: chroma mirror device 14 to the aperture optical system 6 2 The distance to the entrance pupil position of the lens is made to match, so that the size (diameter) of the refractive optical lens can be minimized, and the light shading is minimized, and the illumination efficiency can be improved. The effect is obtained.
- a negative lens having negative power is arranged at a low position of a marginal ray (English) between a micromirror device and a reflecting mirror to meet the Petzval condition. The method to satisfy is described.
- FIG. 43 is a diagram showing a configuration of an image display device according to Embodiment 9 of the present invention
- FIGS. 43 (a) and (b) are an overall view and an enlarged view, respectively. Illustration of the illumination light source unit, micromirror device, screen, etc. is omitted.
- 67 and 68 are refractive optical lenses
- 69 is a convex mirror having a positive Petzval sum contribution component
- ⁇ 0 is a refractive optical lens 67, 68 and a convex mirror 69 are shared.
- ⁇ 2 is a negative lens having a negative beam disposed at a lower position of the marginal ray 71. is there.
- the convex mirror 69 has a positive Petzval sum contribution component
- the entire projection optical system composed of the refractive optical lenses 67, 68 and the convex mirror 69 is used.
- the Petzval sum tends to be a positive value, and field curvature occurs. Therefore, a negative lens with a negative power having a large absolute value is used.
- the point of the ninth embodiment is that when arranging the negative lens 72, a place where the marginal ray ⁇ 1 is low is selected as an arrangement place of the negative lens 72. That is, in the ninth embodiment, the negative lens 72 is arranged at a lower position of the magic ray 71 between the micromirror device (not shown) and the convex mirror 69. Light is concentrated around the optical axis 70 at the low position of the magic ray 71.
- the light is transmitted to the minute portion around the center of the negative lens 72, so that the lens effect of the negative lens 72 on the light can be almost ignored. Therefore, it is not necessary to consider the influence of the negative lens 72 on the optical path design based on the refractive optical lenses 67, 68 and the convex mirror 69, and the positive optical system of the projection optical system. It is possible to cancel the Kobbal sum contribution component. It is not necessary to consider the effect on the optical path, and it is sufficient to satisfy the Peppard condition only by considering the absolute value of the negative power and the refractive index of the glass material, so that the field curvature can be easily reduced. it can.
- a negative lens 72 may be provided in the left aperture optical system 62 of the eighth embodiment, and the reflection surface of the micromirror device (a transmissive optical space such as a liquid crystal) may be provided.
- the emission surface corresponds to the lower part of the marginal ray 71, so that a condenser lens (field flattener) is provided as a negative lens 72 so as to be close to the reflection surface (emission surface). You may.
- the configuration of the negative lens 72 is not particularly limited to a single lens, but may include a negative lens 72 composed of a plurality of lenses. It is possible.
- the negative lens 72 having negative power is disposed at a low position of the marginal ray 71, so that the lens effect on the transmitted light of the negative lens 72 is provided.
- an optical path bending reflecting mirror 59 is inserted between the refractive optical lens 58 and the convex mirror 60, The optical path is bent in a horizontal plane including the optical axis 61.
- the relative arrangement condition of the optical path bending reflecting mirror 59 and the refractive optical lens 58 with respect to the convex mirror 60 shown in the seventh embodiment will be described.
- FIG. 44 is a diagram for explaining the arrangement conditions of the optical path bending reflector.
- FIGS. 44 (a) and (b) are side and top views, respectively, and
- FIG. 44 (c) is FIG. 3 is a front view of the convex mirror 60.
- the same or corresponding components as those in FIG. 25 are denoted by the same reference numerals.
- 73 is the optical axis of the refracting optical lens 58
- 58z is the optical path bending reflecting mirror 59 virtually removed
- the optical axis 61 and the optical axis 73 of the convex mirror 60 are removed. This is the refractive optical lens 58 when the values are matched.
- the optical axis 6 1 and the optical axis 73 intersect at a bending angle 6> on a horizontal plane.
- the optical axis 73 rotates from the state coincident with the optical axis 61 by 180 ° -0 degrees in the horizontal plane, as shown in FIG. 44 (b).
- P and Q each have an optical axis 7 3
- the two points on the intersection of the horizontal plane and the refractive optical lens 58, and the point closest to the optical path from the optical path bending reflecting mirror 59 to the convex mirror 60 is P, the image display with the plane mirror 22 Q is the point closest to the plane mirror installation surface of the device.
- the distance from the convex mirror installation surface (reflection unit installation surface) of the image display device provided with the convex mirror 60 to the position of the optical path bending reflection mirror 59 (the intersection of the optical axis 61 and the optical axis 73) is b
- the point on the intersection of the horizontal plane including the optical axis 61 and the optical path bending reflector 59 is referred to as the closest point to the convex mirror installation surface, the closest point to the convex mirror installation surface, and the furthest point to the convex mirror installation surface.
- the distance from the closest point to the convex mirror installation surface is a
- the distance from the furthest point to the convex mirror installation surface is c.
- the distance c is the longest distance from the surface on which the convex mirror is installed to the light bending reflector 59.
- the height from the highest point of the optical path bending reflecting mirror 59 to the optical axis 61 is m
- the distance from the point Q to the surface where the convex mirror is installed is g
- the refractive mirror is 58 m from the exit pupil position of the convex mirror to the convex mirror.
- the distance to the installation surface is f.
- the distance g is the longest distance from the installation surface of the convex mirror to the refractive optical lens 58. Therefore, the distance from the exit pupil position of the refractive optical lens 58 to the position of the optical path bending reflector 59 and the horizontal distance from the position of the optical path bending reflector 59 to the convex mirror installation surface Is also f.
- Fig. 44 (a) to minimize the height of the lower part of the screen, which is the distance from the lowermost end of the screen 18 to the optical axis 61, go to the lowermost end of the screen 18 It is advantageous if the reflected light beam 75 of the convex mirror 60 passes through a low position as close as possible to the optical axis 61. On the other hand, if the optical path passes through an excessively low position, the optical path bending reflection mirror 59 blocks the optical path, and a portion that cannot be displayed as a shadow on the screen is generated, which is not practical.
- the size and position of the optical path bending reflecting mirror 59 must be determined so that the reflected light of the convex mirror 60 directed to the lowermost end of the screen 18 is not blocked by the optical path bending reflecting mirror 59.
- the distance a is made as large as possible in order to allow the reflected light of the convex mirror 60 to pass through the optical path as low as possible.
- the distance c must be equal to or less than the thickness limit.
- the portion including the point P of the refracting optical lens 58 blocks the light beam from the optical path bending reflecting mirror 59 to the convex mirror 60.
- the portion including the point P of the refractive optical lens 58 is set so as not to block the light beam from the optical path bending reflecting mirror 59 to the convex mirror 60, the distance a becomes unnecessarily short.
- the position of the refractive optical lens 58 will be unnecessarily farther from the optical path bending reflector 59 due to the conditions of the light receiving surface of the convex mirror 60 and the position of the optical path bending reflecting mirror 59.
- the optical path bending reflector 59 becomes large, and the height m of the optical path bending reflector 59 must be increased, and the reflection from the convex mirror 60 toward the bottom end of the screen 18 It blocks ray 75. Therefore, there is an optimal value for distance.
- the distance g or the distance c will exceed the thickness limit value. However, the distance a becomes short, and the height of the reflected light from the convex mirror 60 toward the lowermost end of the screen 18 is increased. Conversely, if the bending angle 0 is reduced, the distance g or the distance c is also reduced, so that the refractive optical lens 58 or the optical path bending reflecting mirror 59 is advantageous from the viewpoint of thickness.
- the portion including the point P of the refracting optical lens 58 enters the optical path from the optical path bending reflecting mirror 59 to the convex mirror 60, blocking the light and projecting an image. Some shadows cannot be created. Therefore, there is an optimum value for the bending angle 6>. Based on the above, the light from the optical path bending reflector 59 to the convex mirror 60 Determine the bending angle 0 of the optical path so that point P is as close to the path as possible without blocking light.
- the thickness of the image display device at this time is limited by the distance g or the distance c, so that the larger one of these distances becomes the thickness limit value. Determine f. In particular, if the distance c and the distance g are set equal, the height of the lower part of the screen can be minimized.
- the bending angle 6> may be predetermined according to other conditions of the image display device, but may be considered in the same manner as in the above case.
- the point P of the refracting optical lens 58 should be set to the above optical path as far as possible without blocking the optical path from the optical path bending reflector 59 to the convex mirror 60. Set the bending angle 0 so that it approaches. '
- the refractive optical lens 5 is set within a range that does not block the optical path from the optical path bending reflecting mirror 59 to the convex mirror 60. Move the point P of 8 as close as possible to the above optical path, and set the distance f so that the distance c or the distance g becomes the thickness limit ⁇
- the point P is brought closer to the optical path from the optical path bending reflecting mirror 59 to the convex mirror 60.
- the refractive optical lens 58 can be made closer to the optical path from the optical path bending reflecting mirror 59 to the convex mirror 60 as compared with the case where the optical path is not deleted.
- ray tracing is performed so as to correct distortion, and the shape of each constituent element of the refractive optical lens 58, the optical path bending reflecting mirror 59, and the convex mirror 61 is determined and arranged. Therefore, it is necessary to form the optical path accurately while maintaining the positional relationship of the components.
- a holding mechanism 74 shown in FIGS. 45 (a) and (b) ((a) is a top view and (b) is a perspective view) is provided so that the refractive optical lenses 58 and The optical path bending reflecting mirror 59 and the convex mirror 60 are integrally held.
- the relative positional relationship between the refractive optical lens 58, the reflecting mirror 59, and the convex mirror 60 is less likely to change, and the effect of stabilizing the performance of the image display device can be obtained. can get.
- the holding mechanism if there is no optical path bending reflecting mirror 59, that is, only the refractive optical lens 58 and the convex mirror 60 may be held by the holding mechanism.
- FIG. 46 is a diagram showing the configuration of the image display device at this time. The same or corresponding components as those in FIG. 44 are denoted by the same reference numerals.
- the light from the micromirror device passes through the first lens means of the refractive optical lens 58, is reflected by the optical path bending reflector 59, and is then reflected by the second lens of the refractive optical lens 58.
- the light passes through the means and proceeds to the convex mirror 60.
- the distance g is the longest distance from the convex mirror installation surface to the refractive optical lens.
- the reflected light 75 of the convex mirror 60 toward the lowermost end of the screen 18 is illuminated as much as possible.
- the reflected light beam 75 passes through a position lower than the highest part R of the exit surface of the refractive optical lens 58, the optical path is blocked by the refractive optical lens 58.
- the shortest distance a from the convex mirror installation surface to the refractive optical lens 58 is arranged as long as possible within a range where the distance g does not exceed the thickness. From the above conditions, even in the case of Fig. 46, there is an optimum value for the distance: f from the surface where the convex mirror is installed to the exit pupil of the refractive optical lens 58. O
- the bending angle 61 of the optical path should be set to a value as small as possible from the viewpoint of slimness, as in the case where the optical path bending reflecting mirror is used between the lens and the convex mirror.
- the first lens means blocks the optical path from the optical path bending reflector to the second lens means. Therefore, also in the case of FIG. 46, it can be seen that the optimum value of the bending angle (exists.
- a prism may be used as the optical path bending means instead of the optical path bending reflecting mirror, and the same effect can be obtained.
- the refractive index lens between the micromirror unit and the reflector is configured such that the lens diameters on the incident light side and the outgoing light side of the refractive optical lens are smaller than those at the center of the lens.
- FIG. 47 is a diagram showing a configuration of an image display device according to Embodiment 11 of the present invention, in which illustration of an illumination optical unit, a screen, and the like is omitted.
- 14 is a micromirror device
- 76 is a refractive optical lens (refractive optical part)
- 77 is a convex mirror having a positive Petzval sum contribution component
- 78 is a refractive optical lens 76 and a convex mirror 7
- An optical axis 7 is shared
- 79 is a marginal ray of light traveling from the micromirror device 14 to the convex mirror 77.
- reference numeral 80 denotes a positive lens having a positive power disposed at a high position of the marginal ray 79
- reference numerals 81 and 82 denote an entrance lens group and an exit lens of each positive lens 80.
- Group, micromi Light from the laser device 14 is transmitted through the incident side lens group 81, the positive lens 80, and the exit side lens group 82 in this order, and travels to the convex mirror 77.
- the convex mirror 7 has a positive Petzval's sum contribution component
- the Petzval's sum of the entire projection optical system tends to be a positive value, and field curvature occurs. Therefore, if the power of the positive lens 80 having a positive power constituting the refractive optical lens 76 is made as small as possible, the increase of the Pettval sum can be suppressed.
- the point of the embodiment 11 is that the positive lens 80 is arranged at a high position of the magic ray 9.
- the effect of the lens action of the positive lens 80 is correspondingly reduced.
- the negative lens 72 is arranged at a lower position of the marginal ray ⁇ 1 so that the lens operation effect can be almost ignored. By arranging it at a position higher than the single ray 9, it is possible to suppress an increase in the Petval sum without impairing the lens action of the positive lens 80.
- the positive lens 80 at the center of the refractive optical lens 76 is the positive lens having a positive power according to the eleventh embodiment, and is installed at a high place of the marginal ray 79. Equipped with the entrance lens group 8 1 and the exit lens group 8 2 of the positive lens 80 By doing so, the configuration is such that the magic ray 79 with the positive lens 80 is increased.
- FIG. 48 is a diagram showing a numerical example 11A of the eleventh embodiment.
- the definition of the aspherical shape in FIG. 48 is the same as that described in Numerical Example 6A.
- the configuration shown in FIG. 47 reduces the lens diameter of the exit part to reduce the refractive index from the optical path bending means to the reflection part, as described in the seventh embodiment, in addition to the above-mentioned Petzval condition.
- the optical path can be made closer to the optical path than in the case where the lens diameter is large in a range where the optical path of the optical path is not obstructed.
- the positive lens 80 can be composed of a plurality of lenses as shown in Fig. 55 according to Numerical Embodiment 14 described later.
- the micromirror device A positive lens 80 with a positive gap is placed at a high position on the magic ray 79 between the surface 14 and the convex mirror 7 so that the increase in the pupil sum of the optical system is suppressed. Since the power of the lens 80 has been reduced, the lens effect of the positive lens 80 can be effectively used to suppress the positive Peppearl sum contribution component of the projection optical system, resulting in an image with reduced field curvature. The effect that a display device can be constituted is obtained.
- Embodiment 11 if the relationship of 1.05 hi and hm ⁇ 3 hi and 0.3 hi ⁇ ho ⁇ hi is satisfied, the lens diameter of the refracting optical lens 76 is reduced. As a result, it is possible to obtain an effect that an image display device having a margin in the insertion range of the optical path bending reflector can be configured.
- Embodiment 1 2
- the effective display surface of the micromirror device 14 is shifted and eccentrically arranged outside the optical axis of the odd-order aspherical surface, and the center (point on the optical axis) of the odd-order aspherical surface is shifted.
- the projection light flux (optical image signal) is guided on the screen 18 by avoiding reflection and transmission. Since the vicinity of the center of the optical axis is not used, odd-order aspherical surfaces can be used. This has described that the degree of freedom of the aspherical convex mirror is improved and the imaging performance is improved. In the center An example will be described in which the imaging position in the optical axis direction in the peripheral portion is shifted from the imaging position in the optical axis direction to give the degree of freedom of the optical system to improve the imaging performance.
- FIG. 49 is a diagram showing the imaging relationship of a general optical system.
- 14 is a micromirror device eccentrically arranged with respect to the optical axis
- 83 is a refractive optical lens (projection optical means)
- 84 is a convex mirror (projection optical means)
- 85 is light Image planes 86 A and 86 B, which are planes including the image position at the axis center and perpendicular to the optical axis, are image positions on the image plane 85 off the optical axis.
- off-axis image positions 86A and 86B are also designed to be on the image plane 85.
- the conditions of the optical system that satisfies the Petzval condition shown in the fifth, ninth, and eleventh embodiments have been shown, and the method of reducing the field curvature has been described.
- FIG. 50 shows an example of an optical system having a curved image surface, where 87 is a refractive optical lens, 88 is a convex mirror, 89 is a curved image surface, and 9OA and 90B are off-axis. This is the imaging position.
- Embodiment 12 It is the point of this embodiment 12 that attention is paid to the fact that the curvature of field as shown by the curved image plane 89 as shown in FIG. 50 is allowed. Under these conditions, it is possible to construct a lens that deviates from the universal condition, and the refractive index and dispersion restrictions of the optical material that constitutes the refractive optical lens 87 are relaxed, thus increasing the degree of freedom in design. Will be. Therefore, it is understood that higher imaging performance is easily obtained. As described above, according to Embodiment 12, the imaging position at the center of the optical axis is deviated from the same plane where the imaging position around the optical axis exists. The above-described degree of freedom is increased, and an effect that an image display device having excellent imaging performance can be configured can be obtained. Embodiment 1 3.
- the shape of the convex mirror tends to be a shape in which the peripheral portion is warped. Focusing on the local curvature of this convex mirror, the curvature of the convex mirror at the center of the optical axis is convex, but the curvature of the convex mirror at the warped portion is concave.
- Light is diverged by a convexly curved reflecting mirror, and light is condensed by a concavely curved reflecting mirror. Therefore, in order to form an image on a screen, the light emitted from the refracting optics entering the convex mirror is light. Convergent light is required at the center of the axis, and divergent light is required at the periphery.
- FIG. 51 is a diagram showing a configuration of an image display device according to Embodiment 13 of the present invention.
- reference numeral 91 denotes a refractive optical lens (refractive optical part)
- 92 denotes a convex mirror whose peripheral portion is warped
- 93 denotes an improved warp of the peripheral portion.
- 9 4 is the optical axis shared by the refractive optical lens 9 1 and the convex mirrors 9 2 and 9 3
- 9 5 is the outgoing light near the optical axis
- 9 6 is the outgoing light near the periphery
- 9 7 is the near optical axis
- 98 is exit pupil of refracting optical lens 91 for outgoing light 96 in the periphery
- 99 is the periphery when exiting from exit pupil 97 FIG.
- the light emitted from the refractive optical lens 91 emerges from the exit pupil 97, like the emitted light 95 passing around the optical axis 94 in FIG. 51 and the emitted light 99 at the periphery. Is common.
- the exit pupil may be located at the position indicated by reference numeral 97, but in order to satisfy the shape without warping like the convex mirror 93, and to make the outgoing light 96 reflected by the convex mirror 93 and corrected for distortion
- the exit pupil 97 near the center of the optical axis 94 as in the exit pupil 98 and the exit pupil 98 of the emitted light in the peripheral portion may be intentionally shifted as shown in FIG.
- Embodiment 14 a method for improving the imaging performance by allowing a distortion difference near the center of the optical axis in the projection optical unit will be described.
- FIG. 52 is a diagram showing a configuration of an image display device according to Embodiment 14 of the present invention.
- 100 is a screen
- 101 is an optical axis shared by a projection optical system (not shown) and the screen 100
- 102 is an optical axis 101
- a circle centered on the circle indicates the maximum range where the circle intersects only at the bottom of the screen 100.
- the restriction of distortion is a major factor that determines the imaging performance, the imaging performance can be improved by removing this restriction.
- the distortion occurs, there are disadvantages that the image around the screen is distorted with respect to the screen frame, or the image is displayed too large or small than the side of the screen frame. In order to minimize these problems, it is necessary to minimize the parts affected by distortion.
- the distortion generated in the optical system is defined as a ratio of distortion to a distance from the optical axis.
- the distortion of the image is hard to understand for the image inside the screen, and it can be easily discriminated if the outermost periphery of the screen is distorted and the screen boundary, which is originally a straight line, becomes a curve.
- distortion occurs on one side close to the optical axis, and the linearity of this side is lost.However, since the distance from the optical axis to this one side is short, the amount of distortion relative to other sides is reduced. This has the effect that the boundary is hardly curved. Furthermore, if the optical axis is on this side, linearity is not lost at the outer boundary.
- FIG. 53 is a diagram showing an image display device when used in a multi-configuration.
- 100A to: L00F is a screen
- 101A to 101F are projection optical units (not shown) of each image display device and a screen 100A: L 0 F shared optical axis
- 102 A ⁇ : L 0 2 F is the largest that the circle centered on the optical axis 101 A ⁇ 100 IF intersects only at the bottom of screen 100 A ⁇ 100 F It shows the range.
- FIG. 54 and FIG. 55 are diagrams each showing a numerical data configuration of Numerical Embodiment 14A.
- FIG. 56 shows the numerical calculation result of the distortion in Numerical Example 14A.
- FIG. 57 shows the distortion of Numerical Example 4A in comparison with a design that allows distortion. As can be seen from FIG. 57, the distortion of Numerical Example 4A is almost 0.1% or less, whereas the distortion of Numerical Example 14A shown in FIG. It can be seen that distortion of up to about 2% is allowed in a range where the image height indicating the distance is small.
- the distortion generated in the optical system as a result of the design allowing the distortion can be corrected by changing the shape of the mirror surface used in bending the optical path.
- the projection optical system 1 corrects the distortion described above. If the shape of the plane mirror 22 that reflects the light from 7 and bends the optical path to the screen 18 is distorted, the distortion of the entire image display device can be corrected.o Embodiment 1 5.
- the convex mirror has two ideas.
- One contrivance can improve the environmental characteristics with respect to temperature changes, and the other contrivance can facilitate alignment adjustment in the assembly process of the image display device.
- FIG. 58 is a diagram showing a configuration of an image display device according to Embodiment 15 of the present invention.
- FIG. 58 (a) is a side view of the image display device, and does not show the illumination optical system, the screen, and the like.
- FIGS. 58 (b) and (c) are a top view and a front view, respectively, of the convex mirror.
- the z-axis is shifted in the direction of the optical axis of the convex mirror
- the X-axis is orthogonal to the Z-axis in the horizontal plane including the optical axis
- the y-axis is orthogonal to the X-axis and the z-axis. It is connected.
- reference numeral 14 denotes a micromirror device
- 103A and 103B denote refractive optical lenses (refractive optical portions) shown in the respective embodiments
- 104 denotes the fifteenth embodiment.
- the convex mirror (reflecting portion) 105 to be characterized is an optical axis shared by the refractive optical lenses 103 A and 103 B and the convex mirror 104.
- the convex mirror 104 is configured by cutting out the non-reflective portion 104C from the rotationally symmetric convex mirror 104 around the optical axis 105 (Fig. 58 (b), (c), implementation). Form 10).
- 104F is a front surface as a reflecting surface of the convex mirror 104 that reflects light from the refractive optical lenses 103A and 103B
- 104R is a front surface.
- Convex mirror provided on the back side of 04 F 1 On the rear surface of 04 is there.
- the aspherical surface of the front surface 104F is designed by precise ray tracing in order to correct distortion, each portion of the convex mirror 104 contracts due to a temperature change in the use environment. If there is a difference in the degree of expansion or expansion, the shape of the front surface 104F will change slightly, affecting the correction of distortion. As a countermeasure against this temperature change, the first device applied to the convex mirror 104 is that the thickness from the front surface 104F to the rear surface 104R is made uniform.
- FIG. 59 is a diagram for explaining a change in the shape of the convex mirror in the thickness direction with respect to a temperature change.
- FIG. 59 (a) is a contracting convex mirror 104
- FIG. 59 (b) is an expanding convex mirror. It represents 104.
- the same or corresponding components as those in FIG. 58 are denoted by the same reference numerals.
- the convex mirror 104 Since the convex mirror 104 is manufactured from a material with a uniform coefficient of linear expansion, the thickness of the convex mirror 104 from the front surface 104 F to the rear surface 104 R is made uniform, so that The thickness change of 04 becomes equal at each part. Therefore, the front surface 104F (dashed line) and the rear surface 104R (dashed line), which are designed and manufactured by ray tracing, shrink and expand in parallel to the optical axis 105. Then, the front surface becomes 104F '(solid line), and the rear surface becomes 104R, (solid line).
- the front surface 104F and the front surface 104F maintain the shape of the front surface 104F, and the shape of the front surface 104F with respect to environmental temperature changes. Change can be suppressed.
- Another contrivance applied to the convex mirror 104 is that a low reflection surface 104 L and a high reflection surface 104 H are formed near the optical axis 105 of the front surface 104 F (see FIG. 58). ).
- the reflectance of the low-reflection surface 104 L is set to be much lower than that of the high-reflection surface 104 H.
- the optical axis 105 near the front surface 104F (non-projection front surface) Since the light is not used to reflect light to a screen or a plane mirror, a low reflection surface 104 L and a high reflection surface 104 H are provided near the optical axis 105 of the front surface 104 F.
- the vicinity of the optical axis 105 of the front surface 104F includes, for example, the optical axis 105.
- the low-reflection surface 104 L and the high-reflection surface 104 H are not aspheric, but are both small planes orthogonal to the circular (semicircular) optical axis 105 centered on the optical axis 105. Is formed on. Assuming that the distance from the intersection of the front surface 104F and the optical axis 105 to the reflection point 106P is R, values rL and rH smaller than R are low reflection surfaces 104L. As the radius of the high-reflection surface 104H, a low-reflection surface 104L and a high-reflection surface 104H are respectively formed by concentric circles (semicircles) centered on the optical axis 105.
- FIG. 60 is a diagram showing an alignment adjustment method using the convex mirror 104.
- the same reference numerals as those in Fig. 58 denote the same components.
- reference numeral 107 denotes a laser which outputs a laser beam having high linearity (straight light)
- reference numeral 108 denotes a laser beam from the laser 107 in only one direction.
- return laser 107 to protect the laser from laser light 109 is the laser light from the half mirror provided between the isolator 108 and the convex mirror 104
- 110 is the laser light from the half mirror 109 It is a detector that detects the power of Arrows with reference numerals 1 1 1 and 1 1 2 indicate the forward and return laser beams during alignment adjustment, respectively, and the two-dot dashed lines with reference numeral 1 1 3 indicate the laser beams 1 1 1 and 1 1 2 This is the virtual optical axis created by.
- the virtual optical axis 113 with respect to the convex mirror 104 is set by the configuration shown in FIG. 60 (a).
- the laser light emitted from the laser 107 in parallel with the horizontal plane passes through the isolator 108 and the half mirror 109 to the convex mirror 104.
- Laser light 111 reflected by the high-reflection surface 104 H and reflected by the detector 110 via the half mirror 109 Make the power of 2 maximum.
- the state in which the maximum power is detected is when the convex mirror 104 is in the most desirable posture, that is, the laser beam 1 1 1 on the outward path from the half mirror 109 to the convex mirror 104, and the half mirror from the convex mirror 104. This is the case where the laser beam 1 1 and 2 on the return path toward 1 109 completely match. If the high-reflection surface 104 H of a plane mirror having high reflectivity is orthogonal to the laser beam 111, the laser beam has high rectilinearity. Thus, the virtual optical axis 1 13 can be created.
- the laser beam 111 reflected by the convex mirror 104 does not enter the detector 110 via the half mirror 109, so the detector 111 0 does not detect power. Even if the posture of the convex mirror 104 approaches the desired state, if the optical axis shifts, the low The launch surface 104 L reflects the laser beam 111 to the half mirror 109. Since the reflectance of the low reflection surface 104 L is low, the laser beam 112 detected by the detector 110 via the half mirror 109 is at a low level, so that the optical axis shift is low. Can be detected. Considering this method, it can be seen that the value of the radius r H of the highly reflective surface 104 H should be determined from the allowable range of the optical axis deviation.
- the light-receiving surface of the detector 110 is formed by four light-receiving elements 110 A, 110 B, 110 C, and 110 D in a “cross-shaped” (two-row, two-column mat). Rix, Figure 60 (c)), and by performing a differential operation on the output signals of each of the light-receiving elements 110A to 110D, the inclination Rx and Ry of the convex mirror 104 can be determined with high precision. Detection adjustment is possible.
- the total optical power incident on the light receiving element can be obtained by adding the outputs of the four divided light receiving elements 110A to 110D, and the optical axis shifts Mx and My can be detected. Therefore, with this configuration, the overall adjustment of Mx, My, Rx, and Ry can be performed.
- the posture of the convex mirror 104 is finely adjusted, so that the virtual optical axis 1 by the laser beams 111, 112 can be obtained. 1 can produce 3.
- the alignment of the refractive optical lenses 103A and 103B is adjusted by the configuration shown in Fig. 60 (b). Insert the refractive optical lenses 103A and 103B into the configuration in which the virtual optical axis 113 of Fig. 60 (a) is created. Also in this case, when the posture of the refractive optical lenses 103 A and 103 B is in a desirable state, the center of the refractive optical lenses 103 A and 103 B is focused on the laser beams 111, 111. 2 will pass.
- the maximum power can be obtained by the detector 110.
- This desirable state corresponds to the case where the optical axes of the refractive optical lenses 103A and 103B coincide with the virtual optical axis 113.
- the convex mirror 104 having the same thickness from the front surface 104F to the rear surface 104R is provided.
- the change in shape of the surface 104F can be suppressed, and the effect of improving the environmental characteristics of the image display device can be obtained.
- the low reflection surface 104L provided near the optical axis 105 of the front surface 104F, and the front surface 104L further than the low reflection surface 104L.
- a high-reflection surface 104 H which has a tolerance for the deviation of the optical axis near the optical axis 105 of the 04 F, is provided on the convex mirror 104, so that the power monitoring and calculation by the detector 110 can be performed.
- the virtual optical axis 113 can be created by the processing, and the alignment of the convex mirror 104 and the refractive optical lenses 103A and 103B can be easily adjusted in the assembly process of the image display device. The effect is obtained.
- FIG. 61 is a diagram showing a configuration of an image display device according to Embodiment 16 of the present invention.
- the illustration of the illumination light source system, the plane mirror, the screen, etc. is omitted.
- reference numeral 14 denotes a micromirror device (transmitting means)
- 114 denotes a cover for protecting the reflecting surface (output surface) of the micromirror device 14 —glass (transmitting means)
- 115 denotes a cover glass.
- Compensating glass (transmitting means) for compensating for variations in the optical thickness of 4, (76) and (77) are the refractive optical lens (refractive optical part) and convex mirror (reflective part) described in each embodiment, respectively.
- Reference numeral 78 denotes an optical axis of the refractive optical lens 76 and the convex mirror 77.
- the micromirror device 14 is provided with a cover glass 114 for protecting the reflecting surface composed of a number of small mirrors.
- Light from an illuminating light source system (not shown) composed of a luminous body, a parabolic surface reflector, a condenser lens, etc. is incident on the reflecting surface via the cover glass 114.
- the light whose intensity is modulated by the reflecting surface passes through the cover glass 114 and then travels to the refractive optical lens 76 and the convex mirror 77.
- the thickness of the cover glass 114 is not always a constant reference value, and the cover glass is manufactured within the allowable difference between the maximum and minimum dimensional thicknesses, so-called tolerance. . Therefore, there is usually an individual difference in the thickness of the cover glass 114. It is also assumed that the standard value of the thickness will be changed in the future. Since the light used for the image display device always passes through the power bar glass 114, the thickness variation caused by individual differences in thickness and changes in the specification of the reference value is caused by the light passing through the cover glass 114. Therefore, the optical path design of the entire optical system is affected by individual differences in the thickness of the cover glass 114.
- a compensation is made between the illumination light source system or the refractive optical lens 76 (not shown) and the cover glass 114. Glass 1 15 is provided.
- FIG. 62 is a view showing the relationship between the thickness of the cover glass 114 and the thickness of the compensation glass 115.
- FIG. 62 (a) shows a case where the thickness t1 of the cover glass 114 is the reference value T1.
- Fig. 62 (b) shows that the thickness t1 of the cover glass 114 is Tl + ⁇ , which is shifted from the reference value T1 by an individual difference ⁇ ( ⁇ includes a plus or minus sign). Represents the case.
- the optical system in the reference state can be used without changing the design.
- FIG. 62 (c) shows a case where the thickness t1 of the cover glass 114 has been changed from the reference value T1 to the reference value T3.
- Cover glass 1 14 mounted It exchanges light with the micromirror device 14.
- the thickness (tl) of the cover glass 114 has a variation (or thickness deviation) from the reference value T1 which is ⁇ ⁇ .
- the present embodiment 16 is applicable not only to the micromirror device 14 but also to other spatial light modulators such as liquid crystal.
- a configuration that allows attachment / detachment of the compensation glass 115 to the entrance side (micromirror device 14 side) of a lens barrel (not shown) that holds the refractive optical lens 76 (refractive optical section) is adopted.
- the compensating glass 115 it is possible to appropriately replace with an optimum thickness in response to a change in the thickness of the cover glass 114 or variation in thickness.
- FIG. 63 and FIG. 64 are diagrams each showing the numerical data and configuration of Numerical Embodiment 16A.
- the same reference numerals as in FIGS. 47 and 61 denote the same or corresponding components.
- Cover glass 1 14 was calculated by including it in compensation glass 1 15 and is shown together in Fig. 64.
- the thickness of the second surface is expressed as the sum of the cover glass 114 and the compensation glass 115.
- this is the result of aberration correction assuming a situation where the reference thickness of the force bar glass is 3 mm and the thickness of the compensation glass is 1.5 mm.
- this variation has an optical thickness that is reduced.
- Compensation glass 115 is provided to exchange light with the reflecting surface of micromirror device 144, so that the thickness of cover—glass 114 cancels out and the optical thickness is always constant.
- the reflection surface of the micromirror device 14 can be regarded as being protected by the glass medium having the above, and the illumination light source system, the refractive optical lens 76 and the convex mirror 77 can be used without changing the design. The effect is obtained.
- the compensation glass is provided on the entrance side (micromirror device 14 side) of the lens barrel (not shown) that holds the refractive optical lens 76.
- FIG. 65 shows the configuration of an image display device using the plane mirror 22 (FIG. 6) of the first embodiment and the optical path bending reflector 59 (FIG. 25, etc.) of the seventh and tenth embodiments.
- FIG. 3 is a perspective view of the image display device. 6 and 25 are denoted by the same reference numerals. Further, illustration of a condensing optical system including an illumination light source system, a micromirror device, a refractive optical lens, and the like is omitted.
- 1 16 is a rectangular parallelepiped image display device
- 1 17 is a lower portion of the screen of the image display device 1
- 1 18 is a horizontal bottom surface of the image display device 1 16
- the surface provided with the screen 18 and the convex mirror 60 and the surface provided with the plane mirror 22 are orthogonal to the bottom surface 118.
- Fig. 65 Cuts the image display device 11.6 in half by a plane including the optical axis 61 and orthogonal to the bottom surface 118.
- the axis is taken in the normal direction of the screen 18, the ⁇ axis is taken in the normal direction of the base 118, and the axis is taken in the direction perpendicular to the ⁇ and ⁇ axes.
- 1 1 9 is a light beam reflected at point ⁇ (third point) on convex mirror (reflection part) 60 (0) (3rd point) and directed to point Q (2nd point) on 2 (2). It is a ray of light reflected at point Q on 2 and directed to point R (first point) on screen (display means) 18. Point R is located on the bottom side of the square image displayed on screen 18 (side parallel to base 118 and close to base 118) and is the point furthest from the center of the image.
- 1 2 1 and 1 2 2 are line segments when light rays 1 1 9 and 1 2 0 are projected from the axial direction to the bottom 1 1 8 respectively, and the points P,, Q,, R, ( (3rd, 2nd, and 1st projection points) are points when the points P, Q, and R are projected from the axial direction to the bottom surface 1 18 respectively.
- the space (placement space) S consisting of the points P, Q, R, P ', Q,, R is extracted as shown in Fig. 65 (b).
- the space S as an arrangement space for the condensing optical system and the like, so that the height of the screen lower part 117 does not increase. Since the rays 1 19 and 1 20 correspond to the point R, be careful not to vignet the rays 1 19 and 1 20 when placing the components of the focusing optics in the space S. All other rays will be vignetting.
- FIG. 66 is a diagram showing a configuration of an image display device according to Embodiment 1 of the present invention.
- FIG. 66 (a) shows a lower portion of the screen of the image display device 116 viewed from the axial direction.
- FIG. 66 (b) is a top view of the image display device 116 viewed from the ⁇ -axis direction.
- the same reference numerals as in Figs. 3, 6, 25, and 6.5 denote the same or corresponding components.
- Fig. 67 (a) and (b) show the A-A,, B-B 'plane orthogonal to the screen 18.
- FIG. 2 is a view showing a cross section of the image display device 1 16, respectively.
- the B-B 'plane is closer to the line segment Q-Q' than the A-A 'plane.
- reference numeral 123 denotes an illumination light source system (transmitting means, an illumination light source unit, and a main part of a condensing optical system) including a luminous body 11, a parabolic mirror 12, and a converging lens 13; 24 is a color wheel (transmitting means, main part of the condensing optical system) that sequentially colors light (illumination light) from the illumination light source system 123 into three primary colors, and 125 is a color wheel.
- a light integrator that receives light on the incident surface and emits light with a uniform illuminance distribution from the light exit surface (transmitting means, main part of the condensing optical system). It is a relay lens (transmitting means, main part of the condensing optical system) that relays the light.
- 127 and 128 are respectively a second optical path bending reflector (second optical path bending means) and a third optical path bending reflector (second 3 is an optical path bending means), and 12 9 is a field lens which is incident on a micro mirror device (transmitting means, reflection type image information adding unit) 14 with the principal ray direction of light from the relay lens 12 26 aligned. Transmission means). The light from the relay lens 1 26 is sequentially reflected by the second and third optical path bending reflecting mirrors 127 and 1 28, and travels to the field lens 1 29.
- the condensing optical system that condenses the light to the micromirror device 14 is composed of an illumination light source system 123, a color wheel 124, a rod integrator 125, a relay lens 126 and a second optical path. It is composed of a bending reflector 127, a third optical path bending reflector 122, and a field lens 122, and in particular, an illumination light source system 123, a color wheel 124, a load integrator. 1 2 5, relay —Lens 1 2 6 is called the main part of the condensing optical system.
- the main part of the condensing optical system is placed in the space S with the optical axis 130 parallel to the bottom surface 118 of the image display device 116 and the light receiving surface of the screen 18. are doing.
- the illumination light source system 123 having the optical axis 130 on the horizontal plane is inclined, and the illumination light source system 123 of the optical axis 130 A is tilted.
- the angle between the optical axis 130 and the optical axis 130 A (9 exceeds a specified value (for example, 15 °))
- the illuminant 1 This is because the internal temperature distribution of 1 (short arc discharge lamp) deviates from the specified state and the life of the illumination light source system 123 is shortened.
- the illumination light source system 1 2 3 does not cause any problem.
- the image display device 116 is not limited to the use form in which the bottom surface 118 is horizontal (FIG. 69 (a)), and is used for, for example, wall-mounting.
- the bottom face 118 is slightly inclined from the horizontal plane (Fig. 69 (b)), or the bottom face 118 is slightly inclined from the horizontal plane by inverting the top and bottom. This is because the use form (Fig. 69 (c)) is also assumed.
- the image display device 1 16 is made thinner (minimizing the size in the axial direction), and the height of the lower portion 117 is reduced (the minimum in the ⁇ -axis direction of the lower portion 117 is reduced).
- the configuration shown in Fig. 66 is adopted to satisfy In this manner, even when the image display device 116 is tilted as shown in FIGS. 69 (b) and (c), the optical axis 130 of the illumination light source system 123 is not changed. Since the rotation is centered, it is possible to cope with various usages of the image display device 116 without impairing the life of the illumination light source system 123. At this time, as shown in Fig.
- the plane mirror 22 is installed in parallel with the screen 18, and the optical path bending reflecting mirror appropriately arranged with respect to the plane mirror 22.
- the position of the refractive optical lens 58 and the position of the micromirror device 14 are determined from the position of the convex mirror 59 and the convex mirror 60. Therefore, the second and third optical path bending reflecting mirrors 12 27 and 1 28 are used to make the light from the main part of the condensing optical system installed in the space S incident on the micromirror device 14.
- the second optical path bending reflecting mirror 127 located at a position higher than the third optical path bending reflecting mirror 128 is installed at a position as low as possible so that the light emitted from the convex mirror 60 is not vignetted.
- the reason for choosing between the relay lens 126 and the field lens 129 as the arrangement position of the second and third optical path bending reflectors 127, 128 is that the other components While the mutual positional relationship is determined by optical conditions such as image formation, by adjusting the focal length of the relay lens 126 and the focal length of the field lens 129, the relative position is determined from the relay lens 126. This is because the optical path length up to the field lens 1 2 9 can be determined appropriately.
- the main part of the condensing optical system is arranged in the space S with the optical axis 130 parallel to the bottom surface 118 and the screen 18 of the image display device 116, and the second and third optical paths are arranged.
- the micro mirror device 14 which is a reflection type spatial light modulator, is transmitted. Light can be collected from the main part of the condensing optical system in the space S.
- the following may be performed to suppress the height of the lower portion 117 of the screen.
- large-diameter components such as the illumination light source system 123 and the color wheel 124 are installed. It is assumed that the height of the lower part 117 of the screen (the position of the bottom surface 118 in the ⁇ -axis direction) is determined by this. Therefore, as shown in Fig. 70, the main part of the condensing optical system consisting of the illumination light source system 12 3 B, the color wheel 124 B, the rod integrator 125 B, and the relay lens 1 26 B
- the optical axis 130B of is tilted at a tilt angle 6>.
- the inclination angle 0 is within the specified value of the illumination light source system 123B.
- the optical axis 130B is parallel to the light receiving surface of the screen 18 and is closer to the intersection between the relay lens 126B and the optical axis 130B than the illumination light source system 123B and the optical axis 130. It is to incline so that the intersection of B becomes higher in the axial direction (vertical direction). In this case, the inclination angle 6> should be kept within the specified value, and care should be taken not to vignet the light beams 119, 120 by the illumination light source system 123B and the color wheel 124B. With the inclination of the optical axis 130B, the position in the axial direction of the second optical path bending reflecting mirror 127b becomes lower, and the axial direction of the illumination light source system 123b and the color wheel 124b. Position becomes higher. The height of the screen lower part 117 is determined by the third optical path bending reflecting mirror 128 located at the lowest position.
- the third optical path bending reflecting mirror 1 28 is disposed on the adjusting table 13 2 which is disposed below the condensing optical system to hold each component and adjust its installation position.
- a storage hole 133 for storing may be provided (FIG. 71). This makes it possible to further reduce the height of the lower portion 117 of the screen.
- the second and third optical path bending reflecting mirrors 127 and 128 have been treated as plane mirrors.
- the present embodiment 17 is not limited to this, and two or one May be used.
- At least one of the second and third optical path bending reflecting mirrors 127 and 128 has a flat or curved refraction.
- a prism having a surface may be used.
- the illumination efficiency to the micromirror device 14, the load integration to the micromirror device 14, the imaging conditions of the exit surface 125, and the entrance pupil of the refractive optical lens 58 It is possible to improve various optical performances, such as the imaging condition of the Fourier transform surface of the relay lens 126 and the uniformity of the illuminance distribution of the illumination light of the micro mirror device 14.
- the main part of the focusing optical system In the example of Fig.
- the illumination light source system 12 3 to the relay lens 12 6) are arranged, so that the thickness of the image display device determined by the plane mirror 22 and the screen 18 is reduced. Within the range, the effect of suppressing the height of the screen lower part 1 17 can be obtained ⁇
- the second optical path bending reflecting mirror 1 27 which reflects light from the main part of the condensing optical system from the illumination light source system 123 to the relay lens 126 is provided.
- a third optical path-bending reflecting mirror 128 that enters the reflected light from the second optical path-bending reflecting mirror 127 through the field lens 127 into the micromirror device 14. Therefore, it was placed in the space S with respect to the micromirror device 14 which is a reflection type spatial light modulator. The effect that light can be collected by the main part of the light collecting optical system is obtained.
- the illumination light source system 123 since the optical axis 130 of the main part of the condensing optical system is set in parallel with the screen 18 and the bottom surface 118, the illumination light source system 123 The effect is obtained that the height of the lower portion 117 of the screen is suppressed and the image display device 116 that can cope with various use forms can be configured without shortening the service life.
- the optical axis 13OB of the main part of the condensing optical system is made parallel to the screen 18 and the light emitting body 11B of the illumination light source system 12B is formed.
- the optical axis 130B should be tilted within the specified value of the tilt angle of the illumination light source system 123B so that the position in the ⁇ axis direction is higher than the position in the axial direction of the relay lens 126B.
- the adjusting table 13 2 for installing the condensing optical system is provided, and the accommodation hole 1 3 3 for accommodating the third optical path bending reflecting mirror 1 28 is adjusted to the adjusting table. Since it is provided at 132, the effect of being able to construct an image display device in which the height of the screen lower part 117 is further suppressed can be obtained.
- the curved surface shape is reduced.
- the image display device 1 16 in Fig. 65 (a) is cut in half. Therefore, one image display device 1 16 has two symmetrical spaces S.
- the condensing optical system is arranged in one space S, and the other components such as the power supply are connected to the other space S. It may be arranged in the space S.
- the optical axis 13 is used without using the second and third optical path bending reflecting mirrors 127, 128.
- the condensing optical system from the illumination light source system 1 2 3 sharing the 0 to the field lens 1 2 9 is arranged in the space S, and the optical axis 1 3 is set in the ⁇ plane according to Figs. 66 and 70. It suffices to make 0 substantially parallel so that light is directly incident on the transmission type spatial light modulating element.
- this embodiment 17 can also be applied to a telecentric projection optical system in which the entrance pupil position of the refractive optical lens 58 is at an apparently infinite point.
- the convex mirror (projection optical means, reflecting portion) in each embodiment may be manufactured with a plastic synthetic resin.
- the shape such as the aspherical surface can be easily formed, and the effect of mass production at low cost can be obtained.
- FIG. 72 is a diagram showing a configuration of a convex mirror applied to the image display device according to Embodiment 18 of the present invention.
- FIGS. 72 (a) and (b) are a front view and a side view, respectively.
- reference numeral 134 denotes a synthetic resin-made convex mirror (projection optical means, reflection unit), which is shown in each embodiment.
- 1 3 5 is the optical axis of the convex mirror 1 3 4.
- the convex mirror 134 has a shape obtained by cutting out a non-reflective portion that does not project light (optical image signal) from the convex mirror 1340 having an aspherical shape that is rotationally symmetric about the optical axis 135 to the screen (No. 7).
- 2 (a) refer to Embodiment 10
- the thickness from the front surface 134F to the rear surface 134R is equal (see FIG. 72 (b), Embodiment 15).
- the threaded portion 13 8 of the first mirror is provided on the convex mirror 134, and the first to third threaded portions 13 6 to 13 8 are screwed as described below to display an image.
- the device holds a convex mirror 134.
- the threaded portions 1336 to 138 and the screw holes 1336H to 1338H are formed simultaneously with the convex mirror 134. It is desirable that
- the first threaded portion 1336 is provided near the optical axis 135.
- the convex mirror 134 seen as a rectangle in the front view (Fig. 72 (a)) viewed from the direction of the optical axis 135, the convex mirror vertex between the front surface 134F and the optical axis 135 is shown.
- the eccentric distance from the optical axis 13 5 to the center of the screw hole 13 6 H is on the lower side closest to 1 35 P (marked with x in Fig. 72 (a)).
- the first threaded portion 1 36 is positioned so as to be short. Eccentric distance The allowable range will be mentioned later.
- the first threaded portion 1336 includes a convex mirror mounting mechanism (first reflecting portion mounting mechanism) 140 fixed to the image display device, a taper screw 139, a shear 1339W, and a nut 1 By 39 N, the position in the plane perpendicular to the optical axis 1 35 of the convex mirror 134 is fixed to the mounting surface of the convex mirror mounting mechanism 140 by a pivot (pivot in English). By pivotally fixing, all degrees of freedom of the convex mirror 134 are fixed except for the rotational movement about the insertion direction of the tapered screw 1339 into the screw hole 1336H.
- the shape of the hole (taper shape) up to the tapered portion of the taper screw 1339 is up to the convex mirror mounting mechanism 140 and the screw hole 1336H of the first screw fixing portion 1336.
- the taper screw 139 passes through the convex mirror mounting mechanism 140 and then through the screw hole 136H, and is tightened using, for example, a shaft 139W and a nut 139N.
- the taper portion of the taper screw 1 39 remains inside the convex mirror mounting mechanism 140, and the portion that has protruded from the convex mirror mounting mechanism 140 is a hash 1339W and a nut 1339N. Fixed.
- the second threaded portion 137 and the third threaded portion 138 are provided on the left side of the convex mirror 134 in FIG. 72 (a). It is provided on the right side and is an isosceles triangle formed by connecting the center point of the second screw portion 137, the center point of the third screw portion 138, and the convex mirror vertex 135P with a line segment. Is made as large as possible.
- the second screw portion 137 and the third screw portion 138 are provided with a convex mirror mounting mechanism (a second reflector mounting mechanism and a third reflector mounting mechanism, respectively) of the image display device. Using straight screws 1 4 1 to the mounting surface of Is held.
- the slide retention means that when the convex mirror 134 expands and contracts thermally, the second threaded portion 133 and the third threaded portion 132 attach to the mounting surface of the convex mirror mounting mechanism 144. It is to shift it along.
- the screw holes 13 7H of the second screw portion 13 7 and the screw holes 13 8H of the third screw portion 13 8 The hole diameter is larger than the screw diameter of the second mirror, and the mounting surface of the convex mirror mounting mechanism 142 has a large area and has a slope in the slide direction. It is held in contact with the threaded portion 1 3 8.
- the straight screw 14 1 passes through the convex mirror mounting mechanism 14 2 and then through the screw hole 13 H (13 H), for example, using a shaft 14 W and a nut 14 N. Then, when the convex mirror 134 expands and contracts thermally, it is loosely tightened with enough strength to slide along the mounting surface of the convex mirror mounting mechanism 142.
- a lubricating layer made of lubricant is provided between the mounting surface of the convex mirror mounting mechanism 142 and the threaded portion 133 (136) as necessary so that the above-mentioned slide occurs smoothly. It can be set up.
- the first to third threaded portions 1336 to 1338 hold the convex mirror 134 at the image display device at three points, and the temperature change of the convex mirror 134
- the feature of this Embodiment 18 is that measures are taken. Next, the operation of the convex mirror 134 with respect to a temperature change will be described.
- FIG. 73 is a view showing how the convex mirror 134 at room temperature undergoes thermal expansion due to a change in temperature.
- the same reference numerals as those in FIG. 72 denote the same components.
- a convex mirror 134 at room temperature and a convex mirror 134 that has been thermally expanded at room temperature are shown.
- Symbols without the symbol “, (dash)” indicate the components of the convex mirror 13 at room temperature
- symbols with the symbol “, (dash)” indicate the components of the convex mirror 13 4 of the thermal expansion. .
- the first threaded portion 1 36 is aligned with the optical axis 135. Since the in-plane position is fixed by the pivot, it becomes a fixed point of stress deformation, and the stress of the shape change due to thermal expansion is applied to the other part of the convex mirror 134. At this time, since the first screwed portion 1336 is provided near the optical axis 135 at a predetermined eccentric distance, the deviation of the optical axis 135 can be minimized.
- FIG. 73 (b) is an enlarged view of the third threaded portion 1338 (broken line) at room temperature and the third threaded portion 1338 '(solid line) at the time of maximum thermal expansion.
- the diameter of the screw hole 13 H (13 H) of the third screw portion 13 38 is made larger than the diameter of the straight screw 14 1 because the hole diameter is made larger.
- the third threaded portion 13 8 slides along the mounting surface of the convex mirror mounting mechanism 14 2, and the front surface 13 4 F of the convex mirror 13 4 has its shape at room temperature and after thermal expansion. Therefore, the optical performance of the image display device can be suppressed from deteriorating due to a temperature change. Of course, the same can be considered if heat shrinkage occurs.
- the relative size of the screw hole 1338H and the straight screw 1441 is based on the temperature specification of the image display device. It can be determined from the shift positional relationship (deviation) between the screw hole 13 H 'at the time of maximum expansion and the screw hole 13 H' at the time of minimum contraction. The relative size of the screw hole 13 H and the screw diameter of the straight screw 14 1 can be determined in the same manner.
- the eccentric distance of the first threaded portion 1336 from the convex mirror vertex 135P can be determined as follows, for example.
- Fig. 74 is a diagram for explaining the deviation ⁇ (0) of the convex mirror vertex 1 35 P when the convex mirror 1 34 rotates around the first threaded portion 1 36 of the eccentric distance EXC. It is. Seventh 2 are the same components.
- the position of the convex mirror vertex 13 35 P of the convex mirror 13 4 is also determined by the first screw portion 13 36. Accordingly, in the assembly process of the image display device, when the first screw portion 1336 is pivotally fixed, a deviation ⁇ (0) of the convex mirror vertex 135P occurs.
- the convex mirror 13 4 rotates by an angle 0 around the screw hole 1 36H, which is eccentric from the vertex 1 35 P of the convex mirror by the eccentric distance EXC.
- the displacement (0) of the convex mirror vertex 135 P in the vertical direction at that time is caused by an assembly error.
- the eccentricity of the first threaded portion 1336 is set so that the deviation (6>) falls within the allowable range from the size of the convex mirror 134 and the adjustable range of the rotation error 0 in the assembly process.
- Distance EXC should be determined.
- the horizontal axis and the vertical axis indicate the rotation error 6> and the deviation ⁇ (0), respectively.
- the adjustable range of rotation error 0 is 2 deg.
- the eccentric distance EXC 0 mm, that is, the center of the screw hole 1336H may be made to coincide with the convex mirror vertex 135P.
- the convex mirror 1 3 4 can be kept in a more ideal state.
- the first to third screwed portions 136-138 are screwed so that the rear surface 134R is closer to the rear surface than the convex mirror mounting mechanisms 140 and 142.
- the shape and position of the front surface 134F formed with high precision and its position are maintained by the convex mirror mounting mechanisms 140 and 142, and the stress of the convex mirror 134 generated by the temperature change changes the shape of the rear surface 134R. This is to ensure that As a result, a change in the shape of the front surface 134F can be suppressed.
- FIG. 75 is a diagram showing a variation of the configuration of the convex mirror 134 which has taken measures against temperature change, and both are front views.
- the same reference numerals as those in FIG. 72 denote the same or corresponding components.
- a concave portion 144 is formed in place of the first threaded portion 1336 so that the curved surface of the columnar support 145 fits into the concave portion 144.
- springs 143 for pulling the convex mirror 134 vertically downward are provided on the left and right sides of the concave portion 144.
- a convex portion 146 is formed instead of the first threaded portion 1336, and the convex portion 146 is fitted into the V-groove portion of the V-groove support 147.
- two springs 143 are provided on the left and right sides of the convex portion 146 to pull the convex mirror 134 vertically downward. ing.
- the convex mirror vertex 1 35 P is located at the center of the arc-shaped convex portion 1 46, the eccentric distance explained in FIG. 74 becomes 0, and the convex mirror 134 becomes more ideal. In a state Can be
- the second screw portion 1337 and the third screw portion are provided on the upper side opposite to the side where the first screw portion 1336 is provided. 1 3 8 may be provided, and the same effect as in the case of FIG. 72 can be obtained. ⁇
- the convex mirror is manufactured from plastic synthetic resin, so that the shape can be easily formed and mass production can be performed at low cost. can get.
- the first screw retaining portion 1 provided near the vertex 135 P of the convex mirror at a predetermined eccentric distance EXC on the lower front side of the convex mirror 134 and fixed by a pipette is provided.
- a third screw retainer 138 held by a slide on the right front of the convex mirror 134 Since it is provided on the convex mirror 134, the shape of the convex mirror 134 is reduced by thermal expansion and contraction caused by temperature changes. It is possible to obtain the effect of suppressing the deformation of the shape and the deviation of the convex mirror vertex 135 P and preventing the optical performance of the image display device from deteriorating.
- the convex mirror mounting mechanism 140 and the first screwed portion 1336 are screwed by the taper screw 1339 and the tapered screw 1 Since a taper-shaped hole matching the taper portion of 39 is provided, an effect is obtained that the pivot can be securely fixed.
- a concave portion 144 provided near the vertex 135 P of the convex mirror at a predetermined eccentric distance EXC at the lower front side of the convex mirror 134, Cylinder support 1 4 5 that fits into 4 4, two springs 1 4 3 with one end fixed to the left and right of the recess 1 4 4
- the threaded portion 13 7 and the third threaded portion 13 8 for holding the slide are provided on the convex mirror 13 4, so that thermal expansion and contraction caused by temperature change cause An effect is obtained that deformation of the shape of the convex mirror 134 and displacement of the optical axis 135 can be suppressed, and deterioration of the optical performance of the image display device can be prevented.
- an arc-shaped convex portion 1 46 and a convex portion 1 46 provided near the vertex 1 35 P of the convex mirror at the lower front side of the convex mirror 1 34 are provided.
- the V-groove support 1 4 7 that fits in the V-groove, and two springs 1 4 3 with one end fixed to the left and right sides of the protrusion 1 4 6 and having a pulling force, and the second that is held in slide Since the threaded portion 13 7 and the third threaded portion 1 3 8 for holding the slide are provided on the convex mirror 1 34, the convex mirror 1 1 is formed by thermal expansion and thermal contraction caused by a temperature change. The effect of suppressing the deformation of the shape of 34 and the displacement of the optical axis 135 and preventing the deterioration of the optical performance of the image display device can be obtained.
- the left and right of the first screwed portion 13 6 One end is fixed in each case, and the other end is fixed at a common point and has two springs 143 having a tensile force, so that when the image display device is used upside down, it is used.
- the stress concentrated on the first screw portion 1336 can be dispersed to the spring 143, and the reliability of the first screw portion 1336 can be improved.
- the front surface of the threaded portions 1336, 137, and 138 which is the reflection surface of the convex mirror 134, is provided for the convex mirror mounting mechanisms 140 and 142. Since the 134F side is kept in contact, the reflection surface of the convex mirror 134 can be arranged with high accuracy.
- the convex mirror 134 has a rotationally symmetrical shape around the optical axis 135, but the present embodiment 18 can also be applied to non-rotationally symmetrical synthetic resin components. It is.
- the number of the second screw portions 13 7 and the third screw portion 138 is not limited to one each, and two or more each may be provided.
- FIG. 77 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention, and the illustration of the configuration after the illumination light source system and the convex mirror is omitted.
- reference numeral 148 denotes a micromirror device (transmitting means, image information providing unit); 149, a refractive optical lens of each embodiment; 150, an optical axis of the refractive optical lens 149; 1 is an optical base (holding mechanism) on which an optical system such as a micromirror device 148 or a refractive optical lens 1449 is installed. It is.
- the optical base 154 corresponds to the holding mechanism 74 (see Embodiment 10) shown in FIG. 45, and includes a refractive optical lens 149 and a not shown optical path bending reflecting mirror / convex mirror. And the micromirror device 148 here as well.
- Reference numerals 15 2 and 15 3 denote two slide supporting columns fixed to the optical pace 15 1 and slidingly supporting the refractive optical lens 1 49.
- Numeral 49 indicates that it can slide on the slide supporting columns 15 2 and 15 3 in the direction of the optical axis 150.
- 15 5 is a mounting plate fixed on the optical pace 15 1
- 15 5 is a mounting plate fixed on the lower part of the refractive optical lens 14
- 15 6 is a control of DC applied from a power supply (not shown)
- a piezoelectric element whose length in the direction of the optical axis 150 changes with voltage.
- Each of the mounting plates 15 4 and 15 5 is located between the slide support column 15 2 and the slide support column 15 3.
- the piezoelectric element 156 is held in contact with the piezoelectric element 156 so as to sandwich the element 56.
- the light (optical image signal) emitted from the micromirror device 148 passes through a refractive optical lens 149 and sequentially to a convex mirror (not shown), a plane mirror, and a screen (not shown) as described in each embodiment. Go on.
- the focus of the image displayed on the screen is initially adjusted, for example, at room temperature, the focus of the image may be out of order due to a change in the temperature of the operating environment of the image display device.
- This out-of-focus is caused by the distance between each lens group and each lens in the refractive optical lens 149, as well as the temperature distribution and linear expansion coefficient of each optical system component on the optical pace 151 and the optical pace 151.
- the degree of thermal expansion and thermal contraction in the direction of the optical axis 150 is different from each other, and the relative positional relationship between the components of the optical system is shifted.
- Especially problems Is the change in the length L0 in the direction of the optical axis 150 from the micromirror device 148 to the refractive optical lens 149, which has a large effect on out-of-focus. We know from analysis and other results.
- a piezoelectric element 156 whose length in the optical axis 150 direction can be adjusted by a control voltage in FIG. 77 is provided. . That is, the initial focus adjustment is performed in a state where the initial offset of the control voltage is applied to the piezoelectric elements 156. Then, the control voltage applied to the piezoelectric element 156 is increased or decreased according to the temperature change of the use environment for the image display device.
- the length of the piezoelectric element 156 is reduced by reducing the control voltage.
- the refractive optical lens 149 slides on the slide support columns 152, 153 and approaches the micromirror device 148 along the optical axis 150. Can be returned to the initial adjustment state.
- FIG. 78 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- the same reference numerals as those in FIG. 77 denote the same components, and the illustration of the components after the illumination light source system and the convex mirror is omitted.
- reference numeral 157 denotes a gear support column fixed on the optical base 151, and precisely and in the direction of the optical axis 150 by a gear mechanism 157G including a motor and the like.
- the refractive optical lens 149 is moved in the direction of the optical axis 150 with a small amount of light.
- 1558 and 159 are temperature sensors, and the temperature sensor 158 is used to measure the barrel temperature T 1 of the refractive optical lens 149 and the temperature sensor 1
- Reference numeral 160 denotes a heating / cooling device for heating / cooling the optical pace 151, and a Peltier element is a typical example.
- Reference numeral 161 denotes a control unit such as a CPU, which controls the gear mechanism 157 G and the heating / cooling device 160 according to the temperatures 1 and T 2.
- the length LOB—L0A was adjusted by the piezoelectric element 156, but in FIG. 78, the refractive optical lens 149 was moved in the direction of the optical axis 150 by the gear mechanism 157G. To adjust the length LOB—L0A. Even in this case, the same effect as in the case of FIG. 77 can be obtained.
- the characteristic point of Fig. 780 is that the temperature sensors 1558 and 1559 sense the temperatures T1 and T2 of the refractive optical lens 149 and the optical base 151, respectively, in real time, The control unit 161 controls the gear mechanism 157 G and the heating / cooling device 160 according to these temperatures Tl and ⁇ 2.
- the temperature sensors 158, 1 Reference numeral 59 denotes the refractive optical lens 14 9, and the temperatures of the optical base 15 1 are T 1, T 2 (T 1 ⁇ ⁇ 2) and are sensed respectively.
- the amount of change A L 0 B of the value of L 0 at which the focus with respect to the lens barrel temperature T 1 is optimal is stored in the control unit 161 in advance.
- the control unit 16 1 calculates the physical change 0 B of the length L 0, and the control unit 16 1 adjusts the gear mechanism 157 G to move the optical focus AL OB— Compensate for the length of L 0 so that AL OA is zero.
- the refractive optical lens 149 is moved by the gear mechanism 157 G so that the optical axis shift amount 5 L 0 B- ⁇ L 0 A (the amount of focus compensation) is canceled out. It moves in the direction of 0, and the focus of the image displayed on the screen (not shown) can be maintained without depending on the temperature change under the use environment.
- piezoelectric element 1 5 As in 6, the gear mechanism 157 G may be operated with a control voltage.
- the control port unit 161 adjusts the gear mechanism 157G to adjust the length of L0.
- the optical base 15 1 is heated and cooled by the heating / cooling device 16 0 ⁇ Cooling, the thermal expansion of the optical base 1 5 ⁇
- the length of L 2 is controlled by using the thermal contraction You may. By doing so, it is possible to suppress the temperature gradient that has caused out-of-focus, and to focus on the image displayed on the screen (not shown) without depending on the temperature change under the usage environment. Can be maintained.
- the countermeasure against the temperature change by 1 and the heating / cooling device 160 may be performed either alone or in combination.
- the number of the temperature sensors 158 and 159 is not particularly limited. Similarly, the number of the heating and cooling devices 160 is not limited, and the temperature sensors 158 and 159 and the heating and cooling are not limited. The position of the container 160 is not limited either.
- the refractive optical lens 149 may be heated and cooled by the superheater 160.
- temperature sensors 1558, 159, and the control unit 161, shown in FIG. 78 may be applied to the piezoelectric element 156 shown in FIG. 77.
- the control port a learning function for the unit 161
- the learning function may be used to take measures against temperature changes.
- the control unit 16 1 directly converts these two points from the two focus adjustment points (T 3, [L 0] ⁇ 3 ) and ( ⁇ 4, [L 0] ⁇ 4 ).
- the interpolation relational expression is derived by linear interpolation.
- the control unit 16 1 senses an arbitrary environmental temperature ⁇ X of the image display device placed in a real environment with a temperature sensor, and determines an optimal length [L 0] ⁇ ⁇ ⁇ ⁇ ⁇ for the environmental temperature ⁇ X.
- the length L0 (the amount of focus compensation) is compensated by the piezoelectric element 156 and the gear mechanism 157G, calculated from the interpolation relational expression.
- the number of learning times is set to 3 or more ⁇ times (the number of focus adjustment points is 3 or more), and an interpolation relational expression is introduced from the relationship between the ⁇ values of the optimal length corresponding to the temperature and the temperature. This will allow more accurate focus compensation.
- the relationship between the environmental temperature and the focus is associated one-to-one with the eyes of the adjuster, and the result is learned by the control unit 161, so that a more accurate pin Adjustments can be made.
- the temperature sensor is provided in the image display device so as to be able to sense the environmental temperature.
- FIG. 79 is a diagram showing a configuration of an image display device according to Embodiment 19 of the present invention.
- the same reference numerals as those in FIGS. 77 and 78 denote the same or corresponding components.
- reference numeral 162 denotes a convex mirror (projection optical means, reflecting portion) of each embodiment
- reference numeral 163 denotes a plane mirror (Embodiment 1) '
- reference numeral 164 denotes a screen (display means).
- the display image on the screen 164 is over-scanned and divided into an image display area 165 and a non-image display area 166.
- the image display area 1655 becomes 100000X744, and the non-image display area 1666 is shaded This gives a 12-dot width band.
- Reference numeral 167 denotes a small reflecting mirror
- reference numeral 168 denotes a CCD element.
- the small reflecting mirror 167 reflects the light projected from the plane mirror 163 to the non-image display area 166
- the CCD element 168 receives the light reflected by the small reflecting mirror 167, from which the light is reflected.
- the obtained focus information is output to the control unit 161.
- the small mirror of the micromirror device 148 is controlled so that, for example, light corresponding to a 1-dot display image is always received by the CCD element 168.
- the light receiving surface of the CCD element 168 and the image forming surface of the screen 164 are arranged at the same optical path length with respect to the projection optical system composed of the refractive optical lens 149 and the convex mirror 162.
- the light from the micromirror device 148 travels to the refractive optical lens 149, the convex mirror 162, the plane mirror 163, and the screen 164 sequentially, and displays an image in the image display area 165.
- the light of the 1-dot display image incident on the non-image display area 166 of the screen 1664 is reflected by the small reflector 167 and incident on the CCD element 168.
- the CCD element 168 refers to all the pixels in the CCD element and obtains the focus information of the image displayed in the image display area 165 from the light of the one-dot display image. Output to the first focus information.
- the control unit 161 analyzes the first bint information and feedback controls the refractive optical lens 149 having the configuration shown in Fig. 77 or Fig. 78 to adjust the image focus. Do.
- the position on the screen where the focus is best may move slightly due to optical non-uniformity. Therefore, by referring to all the pixels in the CCD element 168 each time the focus adjustment is performed, it is possible to compensate for the shift of the focus position on the CCD element 168.
- the light from the feedback controlled refractive optical lens 149 displays an image in the image display area 165.
- the light of the 1-dot display image heading to the non-image display area 1666 is detected as the second focus information by the small reflector 167 and the CCD element 168, and the refractive optical lens 14 It is used for the control of the control unit 16 1 for 9 and the control of the feedback and the work. Hereinafter, the same operation is repeated from the third time onward.
- the focus information is detected by the CCD element 168 from the light of the one-dot display image incident on the non-image display area 166, the secondary information such as temperature is not used. It is possible to adjust the focus directly reflecting the out of focus.
- the projection optical system When focus adjustment is performed on the projection optical system, the projection optical system may move slightly mechanically, or the distortion characteristics may change slightly, causing the 1-dot display image position on the CCD element 168 to slightly move. is there. Even when the entire image display device is moved, the projection optical system may be mechanically deformed by a very small amount due to a change in the stress applied to the image display device from the outside, and the position of the 1-dot display image may slightly move. .
- the size of the CCD element 168 should be sufficiently large for the moving range of the image (so as to satisfy the moving amount of the image and the measurement area), and even if the image is displayed in one dot area. Is moved from the CCD element 1 6 8 Make sure it does not protrude. In this way, if one dot display image position and surrounding information are measured for each measurement, accurate focus adjustment can be performed without affecting the measurement result even if the image moves (shifts). You will be able to
- FIG. 80 is a diagram showing a method of analyzing the focus information of the control unit 161, and shows three methods (a) to (c) of FIG.
- the horizontal axis is the position coordinates of the light receiving surface of the CCD element 168, which is actually a two-dimensional coordinate.
- the vertical axis represents the light intensity.
- Cm and Cm + 1 are electrical signals obtained from each unit light receiving element of the two-dimensional array CCD element 168, and the one-dot display image incident on the CCD element 168 It has a profile proportional to the illuminance distribution of the light.
- P e km and P e km + 1 in Fig. 80 (a) are the intensity peak values of the focus information C m and C m + 1, respectively, and FWHMm and F WHMm + 1 in Fig. 80 (b) are It is the full width at half maximum (Fu11WidthHalfMaximum) of the data Cm and Cm + 1.
- GR AD m and GR AD m + 1 in FIG. 80 (c) are the magnitudes of the inclination of the shoulder converted from the peak values in the pin information C m and Cm + 1, respectively. Represents the slope of the straight line connecting the specific points on the focus information Cm, Cm + 1 where 10% and 90% are obtained.
- the inclination of the shoulder is defined as the inclination of a straight line connecting two points where ⁇ and ⁇ % (0%, ⁇ ⁇ 100%, ⁇ ⁇ ⁇ ) of the peak value are obtained.
- the peak value P e akm + 1 of the m + 1-th focus information is larger than the peak value P e akm obtained from the m-th focus information.
- the control unit 16 1 feedback controls the refractive optical lens 149.
- the first half-width FWHM m + 1 of the first focus information is smaller than the full width at half maximum F WHMm obtained from the m-th focus information.
- control is performed so that the shoulder inclination GRADm + 1 of the m + 1st focus information is larger than the shoulder inclination GRADm obtained from the mth focus information.
- the unit 161 feedback controls the refractive optical lens 149.
- pin preparative information of the semi-slow full width than the width for example, such as 1/1 0 in the intensity of the width 1 / e 2 intensity width
- pin preparative information in Ru gives a predetermined level width (the predetermined level width ) Can of course be minimized.
- the small reflector 167 and CCD element 168 were arranged in the non-image display area 166.
- the image display When the housing of the image display device (indicated by the two-dot dashed line) is limited to the area 165, the small reflector 167 exhibits a particularly effective effect.
- the small reflecting mirror 1667 and the CCD element 168 are arranged inside the housing without causing vignetting of the light projected on the image display area 165. , Focus information can be detected.
- the display pattern for focus adjustment may be a display image such as a line-shaped crosshair other than the one-dot display image.
- the focus adjustment for the temperature change is performed by moving the entire refractive optical lens 149, but the embodiment 19 is not limited to this.
- the refractive optical lens 149 is composed of a plurality of lenses, all of the lenses constituting the refractive optical lens 149 are used to adjust the focus.
- a part of the group or the convex mirror 162 may be moved by the same method as in FIGS. 77 to 80.
- the gear mechanism 1 57 G may be driven and controlled using the gear support column 1 57 provided with the gear mechanism 1 57 G for holding the convex mirror.
- the lens 149A closest to the convex mirror not shown in FIG. 82 and the lens 149 next to the lens 149A next to the lens 149A By moving three lenses, 9B and lens 1449B, next to the convex mirror next to lens 1449B, in the direction of the optical axis 150, it is possible to minimize the degradation of imaging performance. It is known from the result of the numerical calculation that the change in the distance L 0 from the micromirror device 148 to the refractive optical lens 149 can be compensated. As the last part of the embodiment 19, a countermeasure against a temperature change in each component in the vertical direction will be described.
- each component on the optical base (holding mechanism) 151 receives due to temperature change
- the sliding support columns 15 2, 15 3, 15 2, 15 3, and the fixed mirror 16 1, which fixedly supports the convex mirror 16 1 on the optical base are provided.
- the design should be such that the product of the vertical height of the fixed support column 169 and the coefficient of linear expansion is equal.
- the vertical displacement due to the temperature change becomes constant in any of the constituent elements, and the displacement of the optical axis 150 in the vertical direction can be prevented.
- the support columns of the micromirror device 148 are not shown, but the support columns of the micromirror device 148 also have a difference between the vertical height and the coefficient of linear expansion. Make the product equal to other supporting columns.
- two lenses provided on the optical base 15 1 and slidingly supporting all or a part of the refractive optical lens 149 are provided.
- the slide support columns 15 2 and 15 3 are fixed to the optical base 15 1 and the lower part of the entire or a part of the refractive optical lens 14 9, respectively. It is held so as to be sandwiched between the mounting plates 15 54 and 15 5 located between 2 and 15 3 and the mounting plates 15 54 and 15 55.
- the direction of the optical axis 150 is increased or decreased by increasing or decreasing the control voltage.
- the provision of the piezoelectric element 156 whose umbilical length changes allows an effect of adjusting out-of-focus caused by a temperature change to be obtained.
- the whole or a part of the lens group of the refractive optical lens 149 is provided on the optical pace 151, and the gear mechanism 157G is provided by the gear mechanism 157G.
- the gear mechanism 157G is provided by the gear mechanism 157G.
- At least one of the optical pace 15 1 and the refractive optical lens 14 9 is provided with the heating / cooling device 160, so that it is generated under the use environment. The effect is obtained that the temperature gradient can be suppressed and the focus can be adjusted properly.
- a temperature sensor 158 for sensing the barrel temperature T1 of the refractive optical lens 149, and a temperature sensor for sensing the internal temperature T2 of the optical base 151 Calculate the optimum value or temperature difference T of length L 0 from 1 5 9, lens barrel temperature T 1 and internal temperature T 2, and calculate piezoelectric element 15 6, gear mechanism 15 7 G or heating / cooling device 16 Since the control unit 161 is provided to perform feedback control of at least one of the 0s, an effect of adjusting the out-of-focus caused by the temperature change can be obtained.
- the temperature sensor for sensing the temperature under the use environment, the length [L 0] T 3 of the environmental temperature T 3 in the initial focus adjustment, and the initial focus adjustment The length L 0 suitable for the temperature under the use environment is calculated according to the linear interpolation formula that linearly interpolates the length [L 0] ⁇ 4 of the environmental temperature 4, and the piezoelectric element 15 6 or the gear mechanism 1 5 7
- a control unit 161 for feedback control of G is provided, so that the relationship between the environmental temperature and the focus is associated one-to-one, and more accurate focus adjustment is performed. The effect that can be performed is obtained.
- the CCD element 168 for detecting focus information from the light incident on the non-image display area 166 of the screen 164 and the CCD element 168 obtain the focus information. Analyze the focus information obtained and provide feedback control to the piezoelectric element 156 or gear mechanism 157 G Since the camera is provided with the dot 161, the effect is obtained that the focus can be adjusted directly by reflecting the out of focus without using secondary information such as temperature.
- the image display device area 166 is provided. Even when the housing is limited to just about five, the effect that the focus information can be detected is obtained.
- control unit 161 uses the intensity distribution characteristic profile of the light incident on the CCD element 168 as the focus information, and calculates the peak value P e Since feedback control is performed so that akm is as large as possible, the effect is obtained that the focus can be adjusted directly by reflecting the out-of-focus condition.
- control unit 161 uses the intensity distribution characteristic profile of the light incident on the CCD element 168 as the focus information, and calculates the full width at half maximum FWHMm of the bin information. Since the feedback control is performed so as to make it as small as possible, it is possible to obtain an effect that the focus can be adjusted by directly reflecting the deviation of the bin.
- control unit 161 uses the intensity distribution characteristic profile of the light incident on the CCD element 168 as the focus information, and the inclination of the shoulder of the bin information. Since feed-pack control is performed so as to increase GRADm as much as possible, it is possible to obtain the effect that focus can be adjusted by directly reflecting out-of-focus.
- the slide support columns 15 2, 15 3 of the refractive optical lens 149 and the fixed support column 16 9 of the convex mirror 16 1 are vertically aligned with the height and the line. Since the products of the expansion coefficients are all equal, an effect of preventing the optical axis 150 from shifting in the vertical direction can be obtained.
- the micromirror device has been described as the spatial light modulator, but the same effect can be obtained by using another spatial light modulator such as a transmissive or reflective liquid crystal.
- Embodiment 20 Embodiment 20.
- FIG. 84 is a diagram showing a configuration of a convex mirror applied to the image display device according to Embodiment 20 of the present invention.
- reference numeral 170 denotes a convex mirror (projection optical means, reflecting portion) in each embodiment, and a non-reflective portion is cut out from the convex mirror 170 which is rotationally symmetric about the optical axis 17 1. It is shaped into a shape, and has a reflective convex portion 172 near the optical axis 171 on the front surface of the convex mirror 170 (non-projection front surface).
- the reflective convex portion 17 2 is a convex mirror of the high reflective surface 104 H and the low reflective surface 104 L of the convex mirror 104 shown in Embodiment 15 or the entire surface is formed as a high reflective plane. It is projected from the front surface of the convex mirror 170 and is used when performing an alignment adjustment method of the image display device described below.
- a reflective concave part 173 shown in FIG. 84 (b) may be provided in the convex mirror 170.
- the reflecting concave portion 173 is a concave shape of the high-reflecting surface 104 H and the low-reflecting surface 104 L of the convex mirror 104 shown in Embodiment 15 or a high-reflecting surface on the whole surface. It was done.
- the reflecting surfaces of the reflecting convex portion 17 2 and the reflecting concave portion 17 3 are planes, and the normal line of this plane is parallel to the optical axis 17 1.
- FIG. 85 is a flowchart showing an alignment adjusting method according to Embodiment 20 of the present invention.
- FIG. 86 to FIG. 90 are diagrams showing a state where the optical system components are sequentially arranged according to each step of the alignment adjustment method in FIG. 85.
- the same reference numerals as those in Fig. 84 denote the same components.
- ⁇ Step ST1 Adjustment of the alignment of the front mirror to the jig screen
- the parallel light beam emitted from the laser light source 174 is set so as to be parallel to the normal of the jig screen (jig display means) 176. From the laser light source 1 74, a parallel light beam with a larger cross-sectional area than the reflective convex portion 1 72 is emitted, and the parallel light beam is perpendicular to the jig screen 1 76 through the beam splitter 1 75. Incident.
- a transmission hole (first transmission hole) 176H is provided around the optical axis of the jig screen 176 (Fig. 86 (b)), and passes through the beam splitter 175. A part of the collimated light beam passes through the transmission hole 1-6H and is reflected by the convex mirror 170 mounted on the optical pace 1-7 (holding mechanism, see FIG. 45, Embodiment 10). Proceed to convex 1 12.
- the parallel light flux is reflected by the reflection convex portion 1702, and is transmitted through the transmission hole 160H in a direction opposite to the parallel light flux on the outward path.
- the parallel luminous flux of this return path passes through the transmission hole 1-6H, enters the beam splitter 175, and travels in the direction orthogonal to the parallel luminous flux from the laser light source 174, and then condenses.
- the light is focused on the center of the quadrant detector 179 (the detector in Fig. 60 (c)) by the lens 178.
- the forward path and the return path of the parallel light flux between the two coincide with the optical axis 171 (virtual optical axis), and the alignment of the convex mirror 170 with respect to the jig screen 176 is completed.
- a parallel light beam having a larger cross-sectional area than the reflecting convex portion 172 is emitted from the laser light source 174 via the beam splitter 175, and the optical path bending reflecting mirror 18 1 arranged at a predetermined position
- the light is reflected to the reflection convex portion 172.
- the reflecting convex portion 172 has a reflecting surface smaller than the incident parallel light beam, only a part of the parallel light beam is reflected to the optical path bending reflecting mirror 181.
- the parallel luminous flux from the reflective convex portion 172 is reflected by the optical path bending reflecting mirror 18 1, travels to the beam splitter 1 ⁇ 5, and is detected by the quadrant detector 1 79 via the condenser lens 178. Is done.
- the parallel luminous flux between the reflective convex portion 172 and the beam splitter 175 coincides with the outward path and the return path via the optical path bending reflecting mirror 18 1, which is ideal for a refraction optical lens.
- a virtual optical axis 180 is created by the light beam of the laser light source 174.
- Step ST3 Alignment of lens holding flange with perforated mirror>
- a lens holding flange 1 82 that holds a refractive optical lens and a hole-free reflecting mirror 1 83 attached instead of a refractive optical lens Install it on the flange 18 2 (Fig. 88 (a)).
- the perforated mirror 183 is a transmission hole through which light passes (the second It has a transmission hole (183H) at its center (Fig. 88 (b)), and transmits parallel light beams from a laser light source (174) and a beam splitter (175).
- the periphery of the transmission hole 18 3 H is a reflection surface.
- the parallel light beam transmitted through the transmission hole 18 3 H travels from the optical path bending reflector 18 1 to the reflection convex portion 17 2.
- the parallel luminous flux reflected by the reflective convex portion 17 2 is reflected by the optical path bending reflecting mirror 18 1, passes through the transmission hole 18 3 H of the perforated reflecting mirror 18 3, and passes through the beam splitter. Going to 1 ⁇ 5, it is detected by the quadrant detector 179 via the condensing lens 1 ⁇ 8.
- the light beam reflected by the reflection surface around the transmission hole 1883H of the perforated reflection mirror 183 also enters the four-division detector 179 at the same time.
- the quadrant detector 1 ⁇ 9 The light powers detected by the respective light receiving elements are all equal.
- Step ST4 Install a refractive optical lens on the lens holding flange> Remove the hole reflecting mirror 1 8 3 from the lens holding flange 18 2 in the ideal alignment state, and then use a refractive optical lens (projection optical means, refraction).
- Optical unit Replace the 184 with the laser light source 174, the beam splitter 175, the condenser lens 178, and the quadrant detector 179 (Fig. 89).
- Step ST5 Project the image of the micromirror device onto the jig screen>
- the micromirror device (transmitting means, image information providing unit) 185 is installed at a predetermined position, and the micromirror device 185 is provided with an illumination light source system (transmitting means, illumination light source unit). Irradiate light from 186. From the illumination light source system 18 6 which obtained image information with the micro mirror device 18 5 Is projected onto a jig screen 176 via a refractive optical lens 18 4, an optical path bending reflecting mirror 18 1, and a convex mirror 170.
- the reflection convex portion 172 or the reflection concave portion 173 is provided near the optical axis 105 on the front surface of the convex mirror 170. In the process of assembling the image display device, an effect that alignment of the optical system components can be easily performed can be obtained. Also, according to this embodiment 20, the transmission hole of the jig screen 176 is provided.
- the parallel luminous flux transmitted through 1 76 H is reflected by the reflection convex portion 1 7 2 (or the reflection concave portion 1 7 3), and the reflection convex portion 1 ⁇ 2 (or the reflection concave portion 1 7 3) and the transmission hole 17
- steps ST1 to ST5 an example has been shown in which multi-element alignment is adjusted by making the split detector outputs of the quadrant detectors 179 equal to each other.
- a ground glass jig with a crosshair, etc., which is the target for alignment, is placed at the position of the alignment, and it can be adjusted even with a visual observation device that visually observes the condensed light beam on this ground glass jig via an eyepiece etc. It is possible.
- the alignment adjustment described above shows a method of adjusting the angle deviation of the reflecting surface, so that a device (for example, autocollimation) that can measure the inclination of the surface using the same jig is used. It can also be adjusted using.
- the alignment adjustment method shown in this embodiment 20 is also possible with the convex mirror 104 of the embodiment 15; the alignment adjustment method shown in the embodiment 15 is the same as that of the embodiment 20.
- FIG. 91 is a diagram showing a configuration of an image display device according to Embodiment 21 of the present invention. Illumination light source system, flat mirror, screen, etc. are omitted o
- 187 is a micromirror device, and 188 is each device.
- Reference numeral 189 denotes an optical axis
- reference numeral 191 denotes a lens layer made of glass, synthetic resin, or the like bonded to the front surface 189F of the convex mirror 189.
- the light (optical image signal) from the micromirror device 187 and the refractive optical lens 188 is first refracted at the input / output surface 191 I0 of the lens layer 191 and the lens
- the light passes through the inside of the layer 191, and then enters the front surface 189F of the convex mirror 189.
- the light reflected on the front surface 189 F of the convex mirror 189 is transmitted through the inside of the lens layer 191 again, refracted by the entrance / exit surface 191 °, and is not shown in the drawing. Leave for the screen.
- light that is exchanged with the convex mirror 189 is optically affected by the shape of the entrance / exit surface 1911 I0 of the lens layer 1991 and its medium. Therefore, by appropriately designing the surface shape, constituent materials (refractive index, dispersion), and the like of the lens layer 191, it becomes possible to control the optical path more precisely.
- the lens layer 191 is provided on the front surface 189F of the convex mirror 189, so that the input / output surface of the lens layer 191 itself is provided.
- the shape of 911 9 and its refractive index and dispersion appropriate, it is possible to increase the degree of freedom in optical path design and to obtain an effect that more precise light control can be performed.
- FIG. 92 shows the image display device shown in each embodiment housed in a conventional housing.
- Fig. 92 (a), (b), and (c) are a front view, a side view, and a top view of the housing, respectively.
- the optical system components from the illumination light source system to the convex mirror are not shown.
- reference numeral 192 denotes a screen
- reference numeral 193 denotes a lower portion of a screen in which optical system components (not shown) are stored
- reference numeral 194 denotes a front portion of a housing including a screen 192 and a lower portion 193
- 195 is a plane mirror installed in parallel with the screen 192 (see plane mirror 22 in FIG. 6, Embodiment 1)
- 196 is the rear of the housing in which the plane mirror 195 is stored
- 198 is the bottom surface of the image display device. It is.
- the height of the front of the housing 1994 is determined by the vertical installation height of the screen 192 and the height of the lower part of the screen 1993. Is determined by the horizontal length of the screen 19 2.
- the height and width of the rear part of the housing 196 are determined by the vertical installation height and the horizontal length of the plane mirror 195 (however, the size of the rear part 196 is determined by the plane mirror 1). Not limited to 95, depending on the configuration of the image display device, for example, it may be changed to a convex mirror if a flat mirror 195 is not used.
- the screen 192 is provided at the front part 194 of the housing. It can be said that the rear portion of the housing 1 96 is smaller than 4. This is also true for general image display devices.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL14703501A IL147035A0 (en) | 2000-05-10 | 2001-03-22 | Image display device and adjustment for alignment |
CA002377245A CA2377245C (en) | 2000-05-10 | 2001-03-22 | Image display device and adjustment for alignment |
EP01915715A EP1203977A4 (en) | 2000-05-10 | 2001-03-22 | IMAGE DISPLAY AND ALIGNMENT ADJUSTMENT METHOD |
Applications Claiming Priority (12)
Application Number | Priority Date | Filing Date | Title |
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JP2000-137602 | 2000-05-10 | ||
JP2000137602 | 2000-05-10 | ||
JP2000-241757 | 2000-08-09 | ||
JP2000241757 | 2000-08-09 | ||
JP2000273723 | 2000-09-08 | ||
JP2000-273723 | 2000-09-08 | ||
JP2000-313652 | 2000-10-13 | ||
JP2000313652 | 2000-10-13 | ||
JP2000-345571 | 2000-11-13 | ||
JP2000345571 | 2000-11-13 | ||
JP2001-40739 | 2001-02-16 | ||
JP2001040739A JP3727543B2 (ja) | 2000-05-10 | 2001-02-16 | 画像表示装置 |
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KR (1) | KR100449133B1 (ja) |
CN (1) | CN1235078C (ja) |
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TWI408487B (zh) * | 2007-03-20 | 2013-09-11 | Casio Computer Co Ltd | 投影裝置、投影控制方法及記錄有投影控制方法之記錄媒體 |
TWI812715B (zh) * | 2018-06-29 | 2023-08-21 | 日商索尼股份有限公司 | 圖像顯示裝置及投射光學系統 |
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US20070201009A1 (en) | 2007-08-30 |
EP1203977A4 (en) | 2003-09-03 |
US20060098294A1 (en) | 2006-05-11 |
US7230774B2 (en) | 2007-06-12 |
US6994437B2 (en) | 2006-02-07 |
US20010050758A1 (en) | 2001-12-13 |
US20040046944A1 (en) | 2004-03-11 |
KR100449133B1 (ko) | 2004-09-18 |
US6824274B2 (en) | 2004-11-30 |
CN1380989A (zh) | 2002-11-20 |
IL147035A0 (en) | 2002-08-14 |
CN1235078C (zh) | 2006-01-04 |
JP3727543B2 (ja) | 2005-12-14 |
CA2377245A1 (en) | 2001-11-15 |
JP2002207168A (ja) | 2002-07-26 |
EP1203977A1 (en) | 2002-05-08 |
US7572014B2 (en) | 2009-08-11 |
US6631994B2 (en) | 2003-10-14 |
US20050083491A1 (en) | 2005-04-21 |
KR20020041803A (ko) | 2002-06-03 |
CA2377245C (en) | 2005-05-17 |
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