WO2004104689A1 - 光源装置、照明光学装置、プロジェクタ、および光源装置の製造方法 - Google Patents
光源装置、照明光学装置、プロジェクタ、および光源装置の製造方法 Download PDFInfo
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- WO2004104689A1 WO2004104689A1 PCT/JP2004/007425 JP2004007425W WO2004104689A1 WO 2004104689 A1 WO2004104689 A1 WO 2004104689A1 JP 2004007425 W JP2004007425 W JP 2004007425W WO 2004104689 A1 WO2004104689 A1 WO 2004104689A1
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- Prior art keywords
- light
- light source
- reflecting mirror
- reflector
- center
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Classifications
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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
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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
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2026—Gas discharge type light sources, e.g. arcs
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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
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
Definitions
- Light source device illumination optical device, projector, and method of manufacturing light source device
- the present invention provides, for example, a light emitting tube having a light emitting portion in which discharge light emission is performed between electrodes, a first reflecting mirror for emitting a light beam emitted from the light emitting tube in a fixed direction, and interposing the light emitting portion therebetween.
- the present invention relates to a light source device, an illumination optical device, a projector, and a method of manufacturing a light source device, the light source device including a second reflecting mirror provided on a side opposite to the first reflecting mirror.
- an arc tube having a light emitting section, a first reflection for aligning and emitting a light beam emitted from the light emitting section in a certain direction
- a second reflector is provided at a position opposite to the first reflector with the arc tube interposed therebetween, so that light that is emitted from the arc tube and is not used as stray light can be used.
- the relative positions of the arc tube, the first reflecting mirror and the second reflecting mirror must be adjusted in order to set the luminance of the light beam emitted from the illuminating device and the position of the focal point to desired values. High precision is required for position adjustment.
- An object of the present invention is to provide a light source device, an illumination optical device, a projector, and a method of manufacturing a light source device in which the illuminance of an emitted light beam does not decrease.
- a light source device includes: a light emitting tube having a light emitting portion in which discharge light emission is performed between electrodes; a first reflecting mirror that aligns and emits a light beam emitted from the light emitting tube in a certain direction;
- a light source device comprising a second reflecting mirror provided on the opposite side of the first reflecting mirror, wherein the first reflecting mirror has an elliptical curved reflecting surface, and the reflecting surface of the first reflecting mirror ' Has a first focus and a second focus, the center of discharge light emission between the electrodes, The first focal point of the first reflecting mirror does not coincide with the first reflecting mirror, and a light beam emitted from the center of discharge light emission between the electrodes and reflected by the second reflecting mirror forms a light source of the reflecting light source of the second reflecting mirror.
- the center does not coincide with the center of the discharge light emission between the electrodes and the first focal point of the first reflecting mirror, and the center does not coincide with the center of the discharge light emission between the electrodes, the first focal point of the first reflecting mirror and the above.
- the center of the reflection light source of the second reflector is arranged on a straight line perpendicular to a straight line connecting the first focus and the second focus of the first reflector.
- the first focal point of the first reflecting mirror is formed on a straight line perpendicular to a straight line connecting the first focal point and the second focal point of the first reflecting mirror. It is preferably arranged between the center and the center of the reflection light source of the second reflector.
- the first focal point of the first reflecting mirror, the center of the discharge light emission between the electrodes, and the second reflecting point are on a straight line perpendicular to the straight line connecting the first focal point and the second focal point of the first reflecting mirror. Since the center of the reflecting light source of the mirror is arranged, and the first focal point of the first reflecting mirror is arranged between the center of the discharge light emission between the electrodes and the center of the reflecting light source of the second reflecting mirror, The light beam can be converged near the second focal point of the reflecting mirror, and the illuminance of the light beam emitted from the light source device can be improved.
- a first focal point of the first reflecting mirror is arranged at a position closer to a center of discharge light emission between the electrodes than to a center of a reflection light source of the second reflected light. Because the first focal point of the first reflector, which is located between the center of the reflected light source of the second mirror and the center of discharge light emission between the electrodes, is located closer to the center of discharge light emission than the center of the reflected light source Since the first arc image formed by the luminous flux emitted from the center of the discharge light emission having a larger amount of light than the center of the reflected light source can be formed closer to the second focal point of the first reflecting mirror, the amount of light is large. A light beam mainly composed of the first arc image can be emitted to the illumination symmetry of the light source device. '
- the second reflecting mirror is formed by depositing a reflective material on the front surface of the light emitting unit. According to the present invention, since the second reflecting mirror can be easily formed, the light source device can be easily manufactured. '
- An illumination optical device includes: a light emitting tube having a light emitting portion in which discharge light emission is performed between electrodes; a first reflecting mirror that aligns and emits a light beam emitted from the light emitting tube in a certain direction; and An optical device including a second reflecting mirror provided on the opposite side of the first reflecting mirror with the portion interposed therebetween, and a polarization conversion optical system for aligning the light beam emitted from the light source device into one type of linearly polarized light beam and emitting the light beam
- An illumination optical device comprising: a polarization conversion optical system, wherein the polarization conversion optical system separates an incident light beam into two types of linearly polarized light beams and has a plurality of polarization separation films having a shape having a longitudinal direction, and between the polarization separation films.
- the light source device according to any one of the above-described light source devices, further comprising a plurality of reflective films interposed and disposed, wherein a shift direction between a center of the discharge light emission between the electrodes and a center of the reflection light source of the second reflected light.
- a shift direction between a center of the discharge light emission between the electrodes and a center of the reflection light source of the second reflected light.
- the shift direction between the center of the discharge light emission between the electrodes of the light source device and the center of the reflected light source of the second reflecting mirror is parallel to the longitudinal direction of the polarization separation film of the polarization conversion optical system. Therefore, even if the first arc image and the second arc image of the light beam emitted from the light source device are misaligned, the polarization conversion optics is compared with the case where the first arc image and the second arc image do not shift. There is no change in the amount of light flux incident on the polarization splitting film of the system.
- a projector includes the light source device described above or the illumination optical device described above.
- the same effects as those of the light source device or the illumination optical device described above can be obtained.
- the method for manufacturing a light source device includes: a light emitting tube having a light emitting portion in which discharge light emission is performed between electrodes; a first reflecting mirror that aligns and emits a light beam emitted from the light emitting tube in a certain direction; A method of manufacturing a light source device comprising: a second reflector provided on the opposite side of the first reflector with a portion interposed therebetween, wherein a reflection image of the electrode reflected by the electrode and the second reflector is provided. The position of the second reflecting mirror with respect to the arc tube so that Adjusting the position of the second reflecting mirror adjusted with respect to the arc tube to the arc tube, and parallelizing the luminous flux radiated from the arc tube disposed on a reference.
- the first focal point and the second focal point of the first reflecting mirror are on the reference axis on the light beam incident side of the parallelizing lens of the optical system provided with a projection screen on which an image is formed by projection.
- the first reflector Arrange the first reflector so that it is arranged Disposing a light-emitting tube provided with the second reflecting mirror to emit light, and a first arc image formed by a light beam emitted from the light-emitting portion and directly reflected by the first reflecting mirror; Projecting, on the projection screen, a second arc image formed by a light beam emitted from a light emitting unit, reflected by the first reflecting mirror via the second reflecting mirror, and projected on the projection screen
- the light emitting device in which the second reflecting mirror is fixed in a direction parallel to the reference axis and in a direction perpendicular to the reference axis so that the obtained first arc image and the second arc image become the brightest.
- Parallel to the first mirror Rotating the arc tube to adjust the position of the arc tube to which the second reflector is fixed with respect to the first reflector; and adjusting the position with respect to the first reflector. Fixing the arc tube to the first reflecting mirror.
- the first reflector while observing the first arc image and the second arc image projected on the projection screen, the first reflector is adjusted so that the first arc image and the second arc image are brightest.
- the position of the arc tube with respect to is adjusted in the direction parallel to the reference axis and the direction perpendicular to the reference axis, and the direction of deviation between the center of the first arc image and the center of the second arc image is the polarization separation of the polarization conversion optical system. Since the position of the arc tube with respect to the first reflecting mirror is adjusted to be in a direction parallel to the longitudinal direction of the film, a light source device that emits illumination light with high illuminance can be manufactured accurately.
- a second reflector was attached to the arc tube, and the arc tube was rotated to adjust the relative position between the first and second reflectors, so the light source lamp 11 was rotated during adjustment. It is not necessary to change the attitude of the first reflector simply by performing the above operation, so that a light source device that emits illumination light with high illuminance can be easily manufactured.
- it is not necessary to change the posture of the elliptical reflector 12 at the time of adjustment it is possible to make the shape of the elliptical reflector 12 difficult to rotate, for example, a rectangular cross section near the opening. The range expands.
- Another manufacturing method of a light source device includes: a light emitting tube having a light emitting portion in which discharge light emission is performed between electrodes; and a first reflecting mirror that aligns and emits a light beam emitted from the light emitting tube in a certain direction. And a second reflector provided on the opposite side of the first reflector with the light-emitting portion interposed therebetween, comprising: a light source device, wherein the electrode and the electrode reflected by the second reflector are provided. Adjusting the position of the second reflecting mirror with respect to the arc tube so as to deviate from the reflected image; and fixing the second reflecting mirror adjusted with respect to the arc tube to the light emitting tube.
- a collimating lens disposed on a reference axis for collimating a light beam emitted from the arc tube, and a light beam splitting optical element for splitting the light beam emitted from the parallelizing lens into a plurality of partial light beams.
- the light beam split by the light beam splitting optical element is A polarization conversion optics comprising: an imaging element that forms an image at a position; and a polarization separation film having a longitudinal direction in which the polarization directions of the partial light beams split by the light beam splitting optical element are aligned in one direction.
- a superimposing lens for superimposing a light beam emitted from the polarization conversion optical system on an illumination area to be illuminated by the light source device; a frame member having an opening in a shape of the illumination area; A first focus and a second focus of the first reflecting mirror, on a light flux incident side of the collimating lens of an optical system including an illuminometer for measuring the illuminance of the light flux emitted from the opening of the frame member; Arranging the first reflecting mirror so that the light is arranged on the reference axis, applying a voltage to the arc tube to emit light, and adjusting the illuminance of the light beam emitted from the opening of the frame member.
- the frame member While measuring with an illuminometer, the frame member The position of the arc tube where the second reflecting mirror is fixed in a direction parallel to the reference axis and in a direction perpendicular to the reference axis is set so that the illuminance of the light beam emitted from the opening becomes higher. -Fixing to adjust the first reflector, and measuring the illuminance of the light beam emitted from the opening of the frame member with the illuminometer, Rotating the arc tube with respect to the first reflector so that the illuminance of the light beam emitted from the opening of the member is higher, the position of the arc tube to which the second reflector is fixed. Adjusting the position of the arc tube with respect to the first reflecting mirror, and fixing the arc tube to which the second reflecting mirror adjusted in position with respect to the first reflecting mirror is fixed to the first reflecting mirror. And a process.
- the second reflecting mirror is configured such that the illuminance of the light beam emitted from the opening of the frame member having the same shape as the shape of the illumination area to be illuminated by the light beam emitted from the light source device is higher. Since the position of the fixed arc tube is adjusted with respect to the first reflecting mirror, it is possible to easily manufacture a light source device that emits illumination light with higher illuminance to an illumination area to be illuminated by the light source device.
- FIG. 1 is a schematic diagram showing an optical system of a projector 1 to which a light source device and an illumination optical device according to an embodiment of the present invention are applied.
- FIG. 2 is an enlarged sectional view of the light source device according to the embodiment of the present invention.
- FIG. 3 is an enlarged sectional view of an arc tube according to the embodiment of the present invention.
- FIG. 4 is an exploded perspective view of the polarization conversion optical system according to the embodiment of the present invention.
- FIG. 5 is a partially enlarged plan sectional view of the polarization conversion optical system according to the embodiment of the present invention.
- FIG. 6 is a view of the second lens array according to the embodiment of the present invention when viewed from a direction along the optical axis.
- FIG. 7 is a view showing an arc image by the light source device according to the embodiment of the present invention.
- FIG. 8 ′ is a view showing an arc image by the light source device according to the embodiment of the present invention.
- FIG. 9 is a view of a second lens array according to a comparative example of the embodiment of the present invention as viewed from a direction along an optical axis.
- FIG. 10 is a diagram showing an arc image by the light source device according to the comparative example of the embodiment of the present invention.
- FIG. 11 is a diagram showing an arc image by the light source device according to the comparative example of the embodiment of the present invention.
- FIG. 12 is a schematic view for explaining a method of manufacturing the light source device or the illumination optical device according to the first embodiment of the present invention.
- FIG. 13 is a schematic view for explaining a method of manufacturing the light source device or the illumination optical device according to the second embodiment of the present invention.
- FIG. 14 is a schematic view for explaining the method for manufacturing the light source device according to the third embodiment of the present invention.
- FIG. 1 is a schematic diagram showing an optical system of a projector 1 to which an illumination optical device according to a first embodiment of the present invention has been applied.
- the projector 1 is an optical device that modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the image on a screen.
- the light source lamp unit 1,0 as a light source device , Uniform illumination optical system 20, color separation optical system 30, relay optical system 35, optical device 40, and projection lens 50, comprising: optical system 20-35
- the optical element is positioned and adjusted and housed in the optical component housing 2 in which a predetermined reference axis A is set.
- the light source lamp unit 10 and the uniform illumination optical system 20 constitute the illumination optical device 3.
- the light source lamp unit 10 illuminates the optical device 40 by aligning and emitting light beams emitted from the light source lamp 11 in a certain direction, and illuminates the optical device 40.
- the light source lamp 11 and the elliptical reflector 1 will be described in detail later. 2. It has a sub-reflector 13 and a parallelizing concave lens 14.
- the sub-reflector 13 By using the sub-reflector 13 in this way, the light beam emitted from the light source lamp 11 to the opposite side (front side) to the elliptical reflector 12 is forwarded by the sub-reflector 13. Since the light is reflected to the rear, even if the elliptical curved surface on the front side of the elliptical reflector 12 is small, almost all of the light emitted from the light source lamp 11 is incident on the elliptical reflector 12. Can be emitted in a fixed direction, and the optical axis of the elliptical reflector 1 and 2 Directional dimensions can be reduced.
- the length of the elliptical reflector 1 2 in the optical axis direction is smaller than the length of the light source lamp 1 1.
- the light source lamp 1 1 When the light source lamp 1 1 is mounted on the elliptical reflector 1 2, the light source lamp 1 1 The portion protrudes from the light exit opening of the elliptical reflector 12.
- the light beam emitted as convergent light with the emission directions aligned to the front of the device by the elliptical reflector 12 is collimated by the collimating concave lens 14 and enters the uniform illumination optical system 20. .
- the light source lamp unit 10 is detachable from the optical component casing 2 so that it can be replaced when the light source lamp 11 is ruptured or its brightness is reduced due to its life.
- the uniform illumination optical system 20 is an optical system that divides the light beam emitted from the light source lamp unit 10 into a plurality of partial light beams and equalizes the in-plane illuminance of the illumination area, and includes a first lens array 21 and a first lens array 21. It has a two-lens array 4 13, a polarization conversion optical system 23, and a superimposing lens 24.
- the first lens array 21 has a function as a light beam splitting optical element that splits the light beam emitted from the light source lamp unit 10 into a plurality of partial light beams, and has a matrix shape in a plane orthogonal to the reference axis A. It is configured with a plurality of small lenses arranged, and the contour shape of each small lens is the shape of the image forming area of the liquid crystal panels 42 R, 42 G, and 42 B constituting the optical device 40 described later. It is set to be almost similar to.
- the second lens array 4 13 is an optical element that collects a plurality of partial luminous fluxes divided by the first lens array 21 together with the superimposing lens 24, and has a reference axis similar to the first lens array 21.
- This is a configuration including a plurality of small lenses 221 arranged in a matrix in a plane orthogonal to A.
- it is configured to include a 4 ⁇ 6 small lens 221 in a plane orthogonal to the reference axis A.
- the contour shape of each small lens corresponds to the shape of the image forming area of the liquid crystal panels 42 R, -42 G, and 42 B. You don't need to be.
- the polarization conversion optical system 23 adjusts the polarization direction of each partial light beam split and divided by the first lens array 21 to one-way linearly polarized light, which will be described in detail later. Plate 62. Using such a polarization conversion optical system 23 Thereby, the utilization rate of the light source light used in the optical device 40 can be improved.
- the superimposing lens 24 condenses a plurality of partial luminous fluxes that have passed through the first lens array 21, the second lens array 4 13, and the polarization conversion optical system 23, and the liquid crystal panels 42 R, 42 G, and 4 An optical element to be superimposed on an illumination area, which is an image forming area of 2B.
- the superimposing lens 24 is a spherical lens in this example, but an aspherical lens can also be used.
- the color separation optical system 30 includes two dichroic mirrors 31 and 32 and reflection mirrors 33 and 34, and emits from the uniform illumination optical system 20 from the dichroic mirrors 31 and 32. It has a function of separating the plurality of divided light beams into three color lights of red (R), green (G), and blue (B).
- the light beam emitted from the superimposing lens 24 is bent by the reflection mirror 34 and is emitted to the dike opening mirrors 31 and 32.
- the dichroic mirrors 31 and 32 are optical elements formed on a substrate with a wavelength selection film that reflects light beams in a predetermined wavelength range and transmits light beams of other wavelengths.
- the sink mirror 31 is a mirror that transmits red light and reflects other color lights.
- the dichroic mirror 32 disposed downstream of the optical path is a mirror that reflects green light and transmits blue light.
- the relay optical system 35 includes an entrance-side lens 36, a relay lens 38, and reflection mirrors 37 and 39, and the blue color transmitted through the dichroic mirror 32 forming the color separation optical system 30. It has a function of guiding light to the optical device 40. It is to be noted that such a relay optical system 35 is provided in the optical path of blue light because the optical path length of blue light is longer than the optical path lengths of other color lights, and thus the light utilization efficiency due to light divergence and the like. This is to prevent a decrease in In addition, the relay optical system 35 may be configured to transmit blue light among the three color lights, and may be configured to transmit other color light such as red light.
- the red light separated by the dichroic mirror 31 described above is reflected by the reflecting mirror 3
- the optical device 40 After being bent by 3, it is supplied to the optical device 40 via the field lens 41.
- the green light separated by the dichroic mirror 32 is supplied to the optical device 40 via the field lens 41 as it is. Further, the blue light is condensed by the lenses 36 and 38 and the reflecting mirrors 37 and 39 that constitute the optical system 35.
- the light is bent and supplied to the optical device 40 via the field lens 41.
- the field lens 41 provided before the optical path of each color light of the optical device 40 converts each partial light beam emitted from the second lens array 4 13 into a light beam parallel to the reference axis A. It is provided in order to.
- the optical device 40 modulates an incident light beam according to image information to form a color image, and includes a liquid crystal panel 42 as a light modulation device to be illuminated by the illumination optical device 3 and a color combining device. It comprises a cross dichroic prism 43 as an optical system. An incident side polarizing plate 44 is interposed between the field lens 41 and each liquid crystal panel 42R, 42G, 42B. Although not shown, each liquid crystal panel 42R , 42 G, 42 B and the cross dichroic prism 43, an exit-side polarizing plate is interposed, and the incident-side polarizing plate 44, the liquid crystal panel 42 R, 42 G, 42 B, and The light of each color light that is incident is modulated by the emission-side polarizing plate.
- the liquid crystal panels 42R, 42G, and 42B are made of a pair of transparent glass substrates in which liquid crystal, which is an electro-optical material, is hermetically sealed.
- liquid crystal which is an electro-optical material
- a polysilicon TFT is provided as a switching element.
- the polarization direction of the polarized light beam emitted from the incident side polarizing plate 44 is modulated in accordance with the image signal.
- the image forming area for modulating the liquid crystal panels 42 R, 42 G, and 42 B is rectangular, and has a diagonal dimension of, for example, 0.7 inch.
- the cross dichroic prism 43 is an optical element that forms a color image by synthesizing an optical image modulated for each color light emitted from the exit-side polarizing plate.
- the cross dichroic brilliance 43 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and a dielectric multilayer film is formed in an approximately X-shape at the interface where the right-angle prisms are bonded together. ing.
- One of the substantially X-shaped dielectric multilayer films reflects red light, and the other dielectric multilayer film reflects blue light. The blue light is bent and aligned with the traveling direction of the green light, so that the three color lights are combined.
- FIG. 2 is an enlarged sectional view of the light source lamp unit 10.
- the light source lamp unit 10 includes a light source lamp 11 as a light emitting tube having a light emitting portion 11 1, and a first reflecting mirror attached to the light source lamp 11 to align light beams in a certain direction and project forward.
- a sub-reflector 13 as a second reflector provided on the opposite side of the elliptical reflector 12 with respect to the light-emitting portion 11 of the light source lamp 11.
- the light source lamp 11 is composed of a quartz glass tube whose central portion bulges into a sphere, the central portion is a light emitting portion 11 1, and the portions extending on both sides of the light emitting portion 11 1 are sealing portions 1 1 2 1, 1 1 2 2
- the light source lamp 11 various arc tubes that emit light with high luminance can be used, and for example, a metal halide lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, and the like can be used.
- a pair of tungsten electrodes 1141, 1142 arranged at a predetermined distance and mercury, a rare gas, and a small amount of halogen are sealed.
- the metal foils 1 1 5 1 and 1 1 5 2 are further connected with lead wires 1 1 3 1 and 1 1 3 2 as electrode lead wires, and these lead wires 1 1 3 1 and 1 1 3 2
- the light source lamp 11 extends to the outside.
- the light-emitting part .111 emits light to emit a light beam radially.
- a dichrome wire or the like is wrapped around the sealing part '1 122' on the front side of the light source lamps 1 and 1, and when the projector 1 is started up, a current flows through the nichrome wire.
- the light-emitting unit 111 may be preheated. If such a preheating device is provided, the halogen cycle in the light-emitting unit 111 occurs early, so that the light source lamp 11 can be quickly heated. Can be lit.
- a tantalum oxide film, a hafnium oxide film, a titanium If an anti-reflection coating of a multilayer film including an oxide film is applied, light loss due to reflection of light passing therethrough can be reduced. ;
- the elliptical reflector 12 has a neck-shaped portion 1 2 1 through which the sealing portion 1 1 2 1 behind the light source lamp 11 passes, and an elliptical curved-shaped reflecting portion 1 extending from the neck-shaped portion 1 2 1. It is an integral molded product made of glass with 22.
- An insertion hole 123 is formed in the center of the Xiao-like part 121.
- a reflective surface 124 as a cold mirror that reflects visible light and transmits red light and ultraviolet light is formed on the inner surface of the reflective portion 122 by vapor deposition of a metal thin film.
- the first focal point F1 and the second focal point F2 of the elliptical curved surface shape of the reflecting surface 124 are arranged on the reference axis A.
- the light emission center C 2 which is the center between the electrodes 1 1 1 4 1 and 1 1 4 2, of the light source disposed inside the reflection section 1 2 2 is located at the center of the reflection surface 1 2 4 of the elliptical rib reflector 1 2.
- One focus F 1 is shifted in the direction perpendicular to reference axis A.
- the sub-reflector 13 is a reflecting member that covers substantially the front half of the light-emitting part 11 of the light source lamp 11. Further, the sub-reflection mirror 13 has the sealing portion 112 inserted therein, and is fixed to the sealing portion 112 with an adhesive.
- the sub-reflector 13 is made of a low thermal expansion material and / or a high heat conductive material, for example, an inorganic material such as quartz or alumina ceramics, and its reflection surface is formed into a concave curved surface. Like the elliptical reflectors 1 and 2, it is a field mirror.
- the luminous flux A 1 emitted from the emission center C 2 and reflected by the sub-reflector 13 does not return to the emission center C 2, but returns to the center C 1 of the reflected light source of the sub-reflector 13. Heading.
- the center C 1 of the reflected light source of the sub-reflector 13 is arranged on a straight line passing through the emission center C 2 and perpendicular to the reference axis A.
- the first focal point F 1 of the elliptical reflector 1 2, the emission center C 2, and the center C 1 of the reflected light source of the sub-reflecting mirrors 1 and 3 are arranged on a straight line perpendicular to the reference axis A.
- the first focal point F1 is arranged between the center C1 and the emission center C2.
- the amount of deviation between the center C 2 and the center C 1 of the reflected light source is a range in which the light flux emitted from the elliptical reflector 12 can be effectively incident on the collimating concave lens 14. Further, it is preferable that the first focal point F 1 is closer to the emission center C 2 than the center C 1 of the light source.
- the center of light emission C 2 and the center of the reflection light source C 1 are misaligned, so the light beam reflected by the sub-reflector 13 was generated between the electrodes 1 1 4 1 and 1 1 4 2
- the light can be directed to the elliptical reflector 12 with almost no plasma absorption by the arc light source, and is emitted from the light source lamp unit 10.
- the light source lamp unit 10 when a voltage is applied to the lead wires 1131, 1132, a discharge is generated between the electrodes 1141, 1142, and the light-emitting portion 111 emits light. Then, a light beam is emitted radially from the light emission center C2 of the light emitting portion 111. As shown in FIG. 2, of the light beams emitted from the light emission center C 2, the light beam directly directed to the elliptical reflector 12 is reflected by the reflection surface 1 2 4 of the elliptical reflector 12, and the first arc image 7 It becomes convergent light that converges to 1.
- the center C 3 of the first arc image 7 1 is positioned opposite to the second focal point F 2 of the elliptical reflector 12 in a direction opposite to the direction in which the emission center C 2 shifts with respect to the first focal point F 1 of the elliptical reflector 12. It is out of alignment.
- the luminous flux emitted from the luminescent center C 2 is reflected by the sub-reflector 13 to move the center C 1 of the reflected light source.
- the light passes through to the elliptical reflector 12, is reflected again by the reflecting surface 124 of the elliptical reflector 12, and becomes convergent light that converges to the second arc image 72.
- the center C 4 of the second arc image 7 2 is aligned with the elliptical reflector 1 2 in the direction opposite to the direction of deviation of the center C 1 of the reflection light source of the sub-reflector 13 from the first focal point F 1 of the elliptical reflector 1 2 Is shifted with respect to the second focal point F 2 of.
- FIG. 4 shows an exploded perspective view of the polarization conversion optical system 23.
- FIG. 5 shows a partially enlarged cross-sectional view of the polarization conversion optical system 23.
- the polarization conversion optical system 23 is an incident light beam emitted from the light source lamp unit 10 and divided into a plurality of partial light beams by the first lens array, and condensed by the small lenses 2 21 of the second lens array 4 13. And a light-shielding plate 62 provided on the light-incident side of the polarization conversion element 61.
- the polarization conversion element 61 is composed of a plate-like polarization separation element array 63 and a phase difference plate 64 attached to the light exit side of the polarization separation element array '63. .
- the polarization separation element array 6 3 includes a plurality of polarization separation films 6 3 1.
- the polarization splitting film 631 is arranged to be inclined with respect to the incident light beam, and separates the incident light beam into two types of linearly polarized light beams.
- the reflection film 632 reflects one of the linearly polarized light beams separated by the polarization separation film 631.
- the polarized light separating films 631 and the reflecting films 63'2 are inclined at approximately 45 ° in a plan view with respect to the light incident direction and the light emitting direction, and are alternately arranged at the same arrangement pitch. .
- the polarization separation film 631 is formed to be long in the direction orthogonal to the reference axis A, and the long direction is the light emission center C2 of the light source lamp 11 and the center C1 of the reflected light source of the sub-reflector 13. Is parallel to the direction of shift.
- the polarized light separating film 631 is composed of a dielectric multilayer film or the like having a pre-Star angle of about 45 ° and separates a random polarized light beam into two types of polarized light beams.
- a light beam (S-polarized light beam) having a parallel polarization direction is reflected on the incident surface of the polarization separation film 631, and a light beam (P-polarized light beam) having a polarization direction orthogonal to the S-polarized light beam is transmitted. Is what you do.
- the reflection film 632 is made of, for example, a single metal material such as A 1, A u, Ag, Cu, Cr or the like having high reflectivity, or an alloy containing a plurality of these metals. It reflects the S-polarized light beam reflected by the separation film 631.
- the glass member 633 is a member through which a light beam passes, and is usually formed by processing white plate glass or the like.
- the phase difference plate 64 is provided on the light exit side of the glass member 63 3 constituting the polarization separation element array 63.
- One of the two types of light beams emitted from the polarization separation element array 63 is The polarization direction of the polarized light beam is rotated by 90 ° to make it the same as the polarization direction of the other linearly polarized light beam.
- the phase difference plate 64 is a polarization separation element array.
- the polarization direction of the P-polarized light beam that passes through the polarization separation film 631, which is attached to a portion of the light beam exit end face of the light beam 63 where the light beam transmitted through the polarization separation film 631, is emitted, is 90. Rotate.
- the light shielding plate 62 is made of stainless steel or an A1 alloy, and is provided on the light beam incident side of the polarization separation element array 63.
- the light-shielding plate 62 includes a plate member 621, provided corresponding to the reflection film 632, and an opening 62, formed corresponding to the polarization separation film 631. Thereby, the light shielding plate 62 blocks unnecessary light incident on the reflection film 632, and allows only the light flux incident on the polarization splitting film 631 from the second lens array 413.
- the light beam corresponding to the invalid area is shielded by the plate member 6 21 of the light shielding plate 62.
- the second lens array 4 13 condenses the light beam so that the light beam enters only the polarization separation film 6 31, the amount of light shielded by the light shielding plate 62 is extremely small.
- the polarization conversion element 61 Since this incident light beam is a light beam having a random polarization direction, it is separated into a P-polarized light beam and an S-polarized light beam by the polarization separation film 631. That is, the P-polarized light beam passes through the polarization separation film 631, and the S-polarization light beam is reflected by the polarization separation film 631, so that the optical path is changed by approximately 90 °.
- the S-polarized light beam reflected by the polarization separation film 631 is reflected by the reflection film 632, and the optical path is again converted by approximately 90 °, and travels in substantially the same direction as the light incident on the polarization conversion element 61.
- the P-polarized light transmitted through the polarization separation film 631 enters the phase plate 64, and is emitted as an S-polarized light by rotating the polarization direction by 90 °.
- FIG. 6 is a view formed in each small lens 2 21 of the second lens array 4 13 and the second lens array 4 13 viewed from the rear side of the optical path along the reference axis A in FIG. Aro An arc image 70 is shown.
- the arc image 70 is a first arc image 71 (shown by a solid line in FIG. 6) due to the light beam directly reflected by the elliptical reflector 12, and is reflected by the elliptical reflector 12 via the sub-reflector 13.
- the second arc image 7 2 (shown by a two-dot chain line in FIG. 6) is formed by the light flux.
- the position in the plane of the second lens array 4 13 in the direction perpendicular to the reference axis A of the light emission center C 2 of the light source lamp unit 10 with respect to the reference axis A is indicated by a point C 2 ′.
- the position of 1 in the vertical direction with respect to the reference axis A is indicated by a point C 1 ′.
- the center R 1, the point C 2 ′, and the point C 4 ′ of the second lens array 4 13 are aligned on a reference line 1 perpendicular to the reference axis A.
- the reference line L2 is a straight line passing through the center R1 of the second lens array 413 and perpendicular to the reference axis A and the reference line L1. It is considered that the first arc image 71 and the second arc image 72 are formed in each small lens 22 1 as described below.
- the center of the first arc image 71 formed in each of the small lenses 22 1 is directed to the lens light of each of the small lenses 22 1 in the direction opposite to the direction in which the emission center C 2 is shifted from the first focal point F 1. Off-axis.
- the center of the second arc image 72 formed in each small lens 22 1 is oriented in the direction opposite to the direction of displacement of the center C 1 of the reflected light source with respect to the first focal point F 1. Are shifted with respect to the optical axis of the lens.
- the optical axis of each small lens 221, the center of the first arc image 71 and the center of the second arc image 72 are arranged on a straight line parallel to the reference line L1.
- the first arc image 7 1 and the second arc image 7 2 in each small lens 2 2 1 have an elliptical shape whose substantially longitudinal direction is a straight line connecting the center R 1 and the optical axis center of each small lens 2 ⁇ 1. is there. Further, in each small lens 2 21, the longitudinal direction of the first arc image 71 is parallel to the longitudinal direction of the second arc image 72.
- the longitudinal direction of the first arc 3 ⁇ 4 71 and the second arc image 72 is such that the small lens 2 21 near the reference line L 1 and far from the reference line L 2 is substantially parallel to the reference line L 1.
- the direction is almost orthogonal to the reference line L1. That is, in the second lens array 4 13, the first arc images 70 are scattered substantially radially about the center R 1.
- an arc image 70 of the light beam that has passed through the second lens array 4 13 in the polarization conversion optical system 23 will be described.
- FIG. 7 and FIG. 8 show an arc image 70 that would be formed at the opening 62 2 of the light shielding plate 62 of the polarization conversion optical system 23.
- the inclination of the first arc image 71 and the second arc image 72 with respect to the reference line L1 in the longitudinal direction depends on the position of the small lens 2 21 in the second lens array 4 13. Therefore, the amount of light loss of the partial light beam when passing through the aperture 622 of the polarization conversion optical system 23 differs depending on the position of the small lens 2 21 through which the partial light beam has passed.
- the longitudinal direction of the arc image 72 is a direction substantially parallel to the longitudinal direction of the opening 62.
- the direction in which the center of the second arc image 72 is shifted from the center of the first arc image 71 is a direction parallel to the longitudinal direction of the opening 62. Therefore, most of the arc image 70 passes through the opening 62.
- an arc image 70 of a light beam that has passed through the small lens 2 21 farther from the reference line L1 and closer to the reference line L2 will be described. Since the longitudinal direction of the first arc image 71 and the second arc image 72 is a direction that is substantially orthogonal to the longitudinal direction of the opening 62, the first arc image 71 and the second arc image 72 are different from each other. Both ends in the longitudinal direction are blocked by the plate member 621. Therefore, only the central part of the arc image 70 passes through the opening 62.
- the plate member of the arc image 70 changes according to the length of the arc image in the longitudinal direction regardless of the amount of shift between the first arc image 71 and the second arc image 72. .
- the illumination optical device 3 is arranged such that the emission center C 2 and the center of the reflected light
- the emission center C 2 and the sub-reflector 1 Since the direction of deviation from C 1 is parallel to the longitudinal direction of the opening 62 2 of the polarization conversion optical system 23, that is, the longitudinal direction of the polarization separation film 63 1, the light is emitted from the light source lamp unit 10. Even if the first arc image 71 and the second arc image 72 of the light beam are shifted, the polarization conversion optics is compared with the case where the first arc image 71 and the second arc image 72 are not shifted. system There is no change in the amount of light flux incident on 23. Therefore, the emission center C 2 and the sub-reflector 1
- the direction of displacement between the emission center C2 and the center C1 of the reflected light source of the sub-reflector 13 was parallel to the reference ⁇ L1, but Fig. 9, Fig. 10 and Fig.
- the direction of displacement between the emission center C 2 and the center C 1 of the reflected light source of the sub-reflector 13 is a direction orthogonal to the reference line L 1.
- the direction of deviation between the emission center C 2 and the center C 1 of the reflected light source of the sub-reflector 13 is the longitudinal direction of the opening 6 22 of the polarization conversion optical system 23, that is, the longitudinal direction of the polarization separation film 6 3 1 This is a direction orthogonal to the direction.
- the difference between the illumination optical device 3 and the illumination optical device 4 is that the shift direction between the light emission center C2 and the center C1 of the reflection light source of the sub-reflector 13 differs by 90 degrees.
- Other configurations of the illumination optical system 4 are the same as those of the illumination optical device 3, and the same components are denoted by the same reference numerals.
- FIG. 9 shows an arc image 80 to be formed in each of the small lenses 2 21 of the second lens array 4 13 and the second lens array 4 13 viewed from the rear side of the optical path along the reference axis A.
- the arc image 80 is composed of the first arc image 81 (shown by the solid line in FIG. 9) due to the light beam directly reflected by the elliptical reflector 12 and the elliptical reflector 12 through the sub-reflector 13.
- the second arc image 82 (indicated by a two-dot chain line in FIG. 9) formed by the reflected light flux.
- the position of the light emission center C 2 of the light source lamp unit 10 in the direction perpendicular to the reference axis A of the light source lamp unit 10 is indicated by a point C 2 ′, and the reference of the center C 1 of the reflection light source of the sub-reflector 13.
- the first arc image 81 and the second arc image 82 whose position in the vertical direction with respect to the axis A is indicated by a point C 1 ′ are considered to be formed in each small lens 22 1 as described below.
- the center R of the second lens array 4 13 differs from the illumination optical device 3 of FIG.
- each small lens 221, the center of the first arc image 81, and the center of the second arc image 82 are arranged on a straight line orthogonal to the reference line L1.
- the light passing through the second lens array 4 13 is filtered by the polarization conversion optical system 23.
- the image 80 will be described.
- FIG. 10 and FIG. 11 show an arc image 80 that will be formed at the opening 62 2 of the light shielding plate 62 of the polarization conversion optical system 23.
- the inclination of the first arc image 81 and the second arc image 82 with respect to the reference line L1 in the longitudinal direction is determined by the small lenses in the second lens array 41.
- the amount of light loss of the partial luminous flux when passing through the aperture 6 22 of the polarization conversion optical system 23 varies depending on the position of the small lens 2 21 through which the partial luminous flux passes, because it varies depending on the position of 2 2 1 .
- an arc image 80 of a light beam that has passed through the small lens 221, which is closer to the reference line L1 and farther to the reference line L2, will be described.
- the longitudinal direction of the first arc image 81 and the second arc image 82 is substantially parallel to the longitudinal direction of the opening 62
- the second arc image 81 with respect to the center of the first arc image 81 is formed. Since the shift direction of the center of 2 is a direction orthogonal to the longitudinal direction of the opening 62, one side of the direction orthogonal to the longitudinal direction of the first arc image 81 and the second arc image 82 Is blocked by the plate member 6 21. Therefore, only the one side end of the arc image 80 can pass through the opening 622.
- the amount of the portion of the arc image 80 blocked by the plate member 61 changes depending on the amount of displacement between the first arc image 81 and the second arc image 82. As the amount of deviation from the arc image 82 increases, the amount of light blocked by the plate member 62 increases accordingly.
- an arc image 80 of a light beam that has passed through the small lens 2 21 farther from the reference line L1 and closer to the reference line L2 will be described.
- the longitudinal direction of the first arc image 81 and the second arc image 82 is a direction substantially orthogonal to the longitudinal direction of the opening 62, and the first arc image 81 and the second arc image 82 are The longitudinal side end of is cut off by the plate member 6 21.
- the direction of displacement of the center of the second arc image 82 with respect to the center of the first arc image 81 is a direction orthogonal to the longitudinal direction of the opening 62, so that the plate member 6 of the arc image 80
- the amount of the part blocked by 21 changes depending on the amount of deviation between the first arc image 81 and the second arc image 82, and the amount of deviation between the first arc image 81 and the second arc image 82 is large. If possible, the amount of light blocked by the plate member 6 2 1 increases accordingly.
- the illumination optical device 4 the shift direction between the center C 1 of the reflection light source of the sub-reflection mirror 13 and the emission center C 2 of the emission lamp 11 1 Since it is a long direction, that is, a direction orthogonal to the longitudinal direction of the polarization separation film 631, the light enters the polarization conversion optical system 23 according to the amount of deviation between the center C1 of the reflected light source and the emission center C2. The amount of the emitted light flux is reduced. Therefore, when the center C 1 of the reflected light source and the emission center C 2 are displaced in a direction orthogonal to the longitudinal direction of the polarization separation ⁇ 631, the amount of illumination light emitted from the illumination optical device 4 depends on the amount of the deviation. Light is lost.
- the emission center C 2 is shifted by 20 ⁇ m with respect to the center C 1 of the reflection light source of the sub-reflector 13
- the shift amount between the center of the first arc image 71 and the center of the second arc image 72 is 4 It is about 0 ⁇ m.
- the illuminance of the optical image emitted from the illumination optical device 4 formed on the screen 65 is The illuminance of the optical image emitted from the illumination optical device 3 is reduced by about 1.3%.
- the illumination optics device 3 is arranged so that the emission center C2 of the light source lamp unit 10 and the center C1 of the reflection light source of the sub-reflection mirror 13 Is shifted in the direction perpendicular to the reference axis A so that the shift direction between the emission center C 2 and the center C 1 of the reflected light source of the sub-reflector 13 is parallel to the longitudinal direction of the polarization separation film 6 31.
- a light source lamp unit 10 and a polarization conversion element 234 are arranged to prevent loss of the amount of light emitted from the illumination optical device 3.
- the light source lamp unit 10 includes a field lens 41, a first lens array 21 and a second lens array 41 of the uniform illumination optical system 20, and a polarization conversion optical system 23. , A superimposing lens 24, and an optical system 100 having a projection screen 65 on which an image formed by the second lens array 4 13 is projected.
- the parallelizing concave lens 14, the first lens array 21, and the second lens array 41 of the light source lamp unit 10 described above, which are arranged on the reference axis A, are shown.
- the first and second focal points of the elliptical reflector 12 are arranged on the reference axis A in an optical system 100 having a projection screen 65 on which the image formed by the lens array 4 13 is projected.
- the elliptical reflector 12 is arranged on the light incident side of the collimating concave lens 14 so that
- the sub-reflector 13 is sealed to one of the sealing portions 1 1 2 2 so that the light-emitting portion 1 1 1 of the light source lamp 11 of the light source lamp unit 10 faces the reflection surface of the sub-reflector 13. Temporarily.
- the reflected image of 142 is preset in the direction perpendicular to the longitudinal direction of the sealed part 1 1 2 1, 1 1 2 2 of the light source lamp 1 1 with respect to the real electrodes 1 1 4 1 and 1 1 4 2
- the sub-reflector 13 is fixed to one of the sealing portions 112 of the light source lamp 11 with an adhesive at a position shifted by the set dimension, for example, about 20 xm.
- (2-E) Apply voltage to the light source lamp 11 to emit light, and project the optical image of the arc image 70 by the light source lamp unit 10 on the projection screen 65.
- the light source lamp 11 with the sub-reflector 13 fixed is removed.
- the elliptical reflector 12 with the fixed 1 1 is removed from the optical system 100, and the light beam emitted from the elliptical reflector 12 is changed to the elliptical reflector.
- the collimating concave lens 14 is arranged so that the light flux becomes parallel to the straight line where the first and second focal points of 12 are arranged, and the relative position of the elliptical reflector 12 and the parallelizing concave lens 14 is adjusted.
- the elliptical reflector 12 and the parallelizing concave lens 14 are fixed so as to be held.
- the illumination optical device 3 of the first embodiment described above can be manufactured.
- the direction of deviation between the center of the first arc image 71 and the center of the second arc image 72 is the same as that of the polarization separation film 631 of the polarization conversion optical system 23.
- the uniform illumination optical system 20 included in the illumination optical device 3 is disposed with respect to the light source lamp unit 10 so as to be in a direction parallel to the longitudinal direction, and the relative position between the light source lamp unit 10 and the uniform illumination optical system 20 is set. The light source lamp unit 10 and the uniform illumination optical system 20 are fixed so that the position is maintained.
- the illumination optical device 3 is configured such that the direction of deviation between the emission center C 2 of the light source lamp unit 10 and the center C 1 of the reflection light source of the sub-reflector 13 is changed by the polarization separation film of the polarization conversion optical system 23. Since the direction is parallel to the longitudinal direction of 6 3 1, it is possible to prevent the loss of the amount of illumination light caused by the difference between the emission center C 2 and the center C 1 of the reflection light source, and emit illumination light with higher illuminance. It can be done.
- the first focal point F 1 of the elliptical reflector 12 arranged between the center C 1 of the reflection light source of the sub-reflector 13 and the light emission center C 2 of the light source lamp 11 is set to the center of the reflection light source.
- the sub-reflector 13 is attached to the light source lamp 11 so that the image deviates by a predetermined dimension, so the light source lamp 11 emits light and is emitted from the center C 2 and reflected to the sub-reflector 13
- the luminous flux does not pass through the re-emission center C 2, and the luminous flux absorbed by the plasma absorption phenomenon occurring at the luminescence center C 2 can be reduced.
- the light source lamp unit 10 capable of suppressing a decrease in the illuminance of the formed second arc image 72 can be easily manufactured.
- the uniform illumination optical system 2 included in the illumination optical device 3 was similar to the optical system 100.
- the illumination optical device 3 that emits light can be easily manufactured.
- the light source lamp unit 10 is manufactured using the optical system 100, but in the present embodiment, the light source lamp unit 1.0 is manufactured using the optical system 200.
- the field lens 41, the first lens array 21 of the uniform illumination optical system 20, and the second lens array 4 1 are similar to those of the above-described first embodiment.
- 3.It has a polarization conversion optical system 23 and a superimposing lens 24, and is arranged on the light beam exit side of the field lens, and has the shape of the range of the illumination area to be illuminated by the light beam emitted from the light source lamp unit 10.
- Frame member with blue-shaped opening
- the position of the light source lamp 11 with respect to the elliptical reflector 12 was adjusted while observing the arc image 70 formed on the projection screen 65 of the optical system 100.
- the ellipse of the light source lamp 11 is measured while measuring the illuminance of the light beam emitted from the opening of the frame member 421 of the optical system 200 by using an illuminometer with the integrating sphere 65a. Adjust the position of reflectors 1 and 2.
- a projection lens 50 may be arranged between the frame member 42 1 and the integrating sphere 65 a.
- a method for manufacturing the light source device and the illumination optical device according to the present embodiment will be described in Byeon.
- (3-A) Parallelizing concave lens 14, first lens array 21, second lens array 4 13, polarization conversion optical system 23, superimposing lens 24, field lens arranged on reference axis A 4 1, the frame member 4 2 1 and the optical system 200 with an integrating sphere that measures the illuminance of the light beam emitted from the frame member 4 2 1 have the first and second focal points of the elliptical reflector 12
- the elliptical reflector 12 is arranged on the light flux incident side of the parallelizing concave lens 14 so as to be arranged on the reference axis A.
- the luminous flux emitted from the elliptical reflector 12 is divided into the first focus and the second focus of the circular reflector 12.
- the elliptical reflector 12 and the parallelizing concave lens 1 are arranged such that the relative position between the elliptical reflector 12 and the parallelizing four lens 14 arranged so as to become a light beam parallel to the straight line where 4 and are fixed.
- the above-described illumination optical device 3 of the first embodiment can be manufactured.
- the uniform illumination optical system 20 included in the illumination optical device 3 is disposed with respect to the light source lamp unit 10 and the light source lamp cut 10 and the uniform illumination optical system.
- the light source lamp unit 10 and the uniform illumination optical system 20 are fixed so that the relative position with respect to 20 is maintained.
- the light source lamp unit 10 Since there is no need to change the-, it is possible to easily manufacture the light source lamp unit 10 that emits illumination light with high illuminance. In addition, since it is not necessary to change the posture of the elliptical reflector 12 at the time of adjustment, it is possible to make the shape of the elliptical reflector 12 difficult to rotate, for example, a rectangular cross section near the opening. Spreads.
- the shift direction between the center of the first arc image 71 and the second arc image, the polarization conversion optical system By rotating the light source lamp 11 on which the sub-reflector 13 is fixed with respect to the elliptical reflector 12 so that the longitudinal direction of the polarization separation film 6 3 1 becomes parallel to the sub-reflector, although the position of the light source lamp 11 to which 13 is fixed is adjusted with respect to the elliptical reflector 12, in the present embodiment, the elliptical reflector is also mounted together with the light source lamp 11 to which the sub-reflector 13 is fixed.
- the sub-reflector is rotated so that the shift direction between the center of the first arc image 71 and the second arc image is parallel to the longitudinal direction of the polarization separation film 631 of the polarization conversion optical system 23. ⁇ Adjust the position of the light source lamp 1 1 where 3 is fixed with respect to the elliptical reflector 1 2
- the optical system 1 Place the elliptical reflector 12 at 0 0 or 2000, adjust the position of the sub-reflector 13 with respect to the light source lamp 11 and fix it, and fix the sub-reflector 13 to the light source lamp 1 1 Adjust the position by moving the position in the direction parallel to the reference axis ⁇ ⁇ ⁇ ⁇ with respect to the elliptical reflector 1 and 2 in the direction perpendicular to the reference axis A.
- (4-B) Inject the heat-resistant inorganic adhesive AD into the insertion hole 1 23 of the elliptical reflector 12 and hold the light source lamp 11 with a jig or the like to cure the adhesive AD. Thereby, the light source lamp 11 to which the sub-reflector 13 is fixed is attached to the elliptical reflector 12.
- the elliptical reflector 1 2 is observed while observing the first arc image 71 and the second arc image 72 formed on the projection screen 65. Based on By rotating about the axis A (that is, a straight line passing through the first focal point F1 and the second focal point F2) as a central axis, a deviation between the center of the first arc image 71 and the center of the second arc image 72 is obtained.
- the position of the light source lamp 11 to which the sub-reflector 13 is fixed is elliptical so that the direction is parallel to the longitudinal direction of the polarization separation film 63 1 of the polarization conversion optical system 23. Adjust to 2. '
- the illuminance of the light beam emitted from the opening of the frame member 42 1 is measured with the integrating sphere 65a, and the ellipsoidal reflector 12 is used as a reference as described above. Rotate around axis A and adjust so that the illuminance value measured with the integrating sphere 6.5a becomes higher.
- the luminous flux emitted from the elliptical reflector 12 changes the first focal point and the second focal point of the elliptical reflector 12.
- the elliptical reflector 12 and the parallelizing concave lens 14 are arranged so that the relative position between the elliptical reflector 12 and the parallelizing concave lens 14 arranged to be a light beam parallel to the arranged straight line is maintained. Fix it.
- the illumination optics of the first embodiment described above is achieved.
- Device 3 can be manufactured.
- the sub-reflection mirror 13 is attached to the light source lamp 11, but the present invention is not limited to this, and a sub-reflection mirror may be formed by depositing a reflective material on the front surface of the light source lamp.
- the sub-reflector can be easily formed, so that the light source lamp unit 10 can be easily manufactured.
- the present invention provides a projector using only one liquid crystal panel, The present invention is applicable to a projector using one liquid crystal panel or a projector using four or more liquid crystal panels.
- a transmissive liquid crystal panel having a different light incident surface and a light exit surface is used.
- a reflective liquid crystal panel having the same light incident surface and light exit surface may be used.
- a liquid crystal panel is used as the light modulation device.
- a light modulation device other than liquid crystal such as a device using a micro mirror, may be used.
- the polarizing plates on the light-incident side and the light-exit side can be omitted.
- the light source lamp unit or the illumination optical device of the present invention is employed in the projector, but the present invention is not limited to this, and the light source lamp unit or the illumination optical device of the present invention is applied to other optical devices. May be.
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Abstract
Description
Claims
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JP2005506433A JP3982552B2 (ja) | 2003-05-22 | 2004-05-24 | 光源装置、照明光学装置、プロジェクタ、および光源装置の製造方法 |
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US (1) | US7040768B2 (ja) |
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US7628494B2 (en) | 2004-12-07 | 2009-12-08 | Seiko Epson Corporation | Illuminating apparatus and projector |
US7830098B2 (en) | 2007-02-06 | 2010-11-09 | Seiko Epson Corporation | Projector and light source device thereof |
JP2010281893A (ja) * | 2009-06-02 | 2010-12-16 | Seiko Epson Corp | 光源装置、照明系、プロジェクター |
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- 2004-05-21 US US10/849,877 patent/US7040768B2/en not_active Expired - Fee Related
- 2004-05-24 CN CNB2004800137564A patent/CN100523999C/zh not_active Expired - Fee Related
- 2004-05-24 WO PCT/JP2004/007425 patent/WO2004104689A1/ja active Application Filing
- 2004-05-24 JP JP2005506433A patent/JP3982552B2/ja not_active Expired - Fee Related
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7628494B2 (en) | 2004-12-07 | 2009-12-08 | Seiko Epson Corporation | Illuminating apparatus and projector |
JP2007309963A (ja) * | 2006-05-16 | 2007-11-29 | Hitachi Ltd | 投射型表示装置 |
US7830098B2 (en) | 2007-02-06 | 2010-11-09 | Seiko Epson Corporation | Projector and light source device thereof |
JP2010281893A (ja) * | 2009-06-02 | 2010-12-16 | Seiko Epson Corp | 光源装置、照明系、プロジェクター |
US8506128B2 (en) | 2009-06-02 | 2013-08-13 | Seiko Epson Corporation | Light source device, illumination system, and projector |
WO2014167406A1 (ja) * | 2013-04-09 | 2014-10-16 | 株式会社オーク製作所 | 光源装置および光源装置を備えた露光装置 |
JPWO2014167406A1 (ja) * | 2013-04-09 | 2017-02-16 | 株式会社オーク製作所 | 光源装置および光源装置を備えた露光装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004104689A1 (ja) | 2006-07-20 |
CN1791835A (zh) | 2006-06-21 |
US20050036318A1 (en) | 2005-02-17 |
US7040768B2 (en) | 2006-05-09 |
CN100523999C (zh) | 2009-08-05 |
JP3982552B2 (ja) | 2007-09-26 |
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