WO2017181360A1 - 用于近眼显示的目镜光学系统及头戴显示装置 - Google Patents
用于近眼显示的目镜光学系统及头戴显示装置 Download PDFInfo
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- lens
- optical system
- eyepiece
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- eyepiece optical
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- 230000003287 optical effect Effects 0.000 title claims abstract description 319
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
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Classifications
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
-
- 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
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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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
- G02B17/002—Arrays of reflective systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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- 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
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
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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
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
Definitions
- the present invention relates to the field of optical technology, and more particularly to an eyepiece optical system and a head mounted display device for near-eye display.
- the head-mounted display device directs the video image light emitted by the micro-image display (for example, transmissive or reflective liquid crystal display, organic electroluminescent device, DMD device) to the user's pupil through optical technology, in the user's near eye
- the micro-image display for example, transmissive or reflective liquid crystal display, organic electroluminescent device, DMD device
- the range realizes virtual and enlarged images, providing users with intuitive and visual images, videos and text information, which can be applied to outdoor, simulated driving, training, demonstration, teaching, training, medical, flight and other scenarios.
- the eyepiece optical system is the core of the head mounted display device, which realizes the function of displaying a miniature image in front of the human eye to form a virtual enlarged image.
- the design of the eyepiece optical system directly affects the key factors such as the volume and visual experience of the head-mounted display device.
- an optical system applied to an optical non-see-through head-mounted display device it is required to realize a large field of view in a small size and requires high optical resolution so that it can see enough picture details. At the same time, it is required to facilitate long-term viewing without visual fatigue.
- an optical system suitable for an optical non-see-through head mounted display device has not been found.
- Patent US Pat. No. 7,180,675 B2 discloses an optical system of a viewfinder consisting of two positive and negative optical elements and a folding device.
- the eyepiece system only achieves a display effect of about 18° field of view, and the color difference is severe, C-line and F
- the -line color difference is greater than 0.5 mm, which cannot achieve a higher resolution optical display effect, and thus cannot be applied to an optical non-see-through head-mounted display device.
- Patent US Pat. No. 8,531,774 B2 discloses an optical system of a viewfinder comprising two positive lenses, a negative lens and a reflecting unit, and two positive and negative lenses are placed between the observer's eye and the reflecting unit, although the optical system can realize 26
- the angle of view of °, but its exit position is shorter ( ⁇ 11mm), and the size along the line of sight is larger.
- the comfortable wearing requirements of the product cannot be satisfied, and at the same time, the optical astigmatic aberration remains large, and the edge field of view image quality is difficult to achieve high-resolution optical effects, which is disadvantageous for long-term comfort. Visual experience.
- the technical problem to be solved by the present invention is to provide an eyepiece optical system and a head mounted display device for near-eye display in view of the above-described drawbacks of the prior art.
- an eyepiece optical system for near-eye display comprising a first lens, a reflection unit, a second lens, and a third lens group arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side;
- the optical axes of the second lens and the third lens group are coaxial and perpendicular to the micro image display; the optical axes of the second lens and the third lens group are reflected by the reflection unit and are coaxial with the optical axis of the first lens;
- the third lens group includes at least a third lens;
- the second lens and the third lens are optical aspherical surfaces; the first lens is a unique lens disposed between the reflective unit and the viewing side of the human eye; an effective focal length f of the first lens 11.
- the effective focal length f 21 of the second lens and the effective focal length f 31 of the third lens respectively satisfy the following relations (1), (2), and (the effective focal length f w of the eyepiece optical system) 3):
- the optical surface of the second lens near the side of the micro image display is concave toward the micro image display, the optical surface of the first lens near the viewing side of the human eye is convex toward the human eye, and the third lens is a lenticular lens;
- the third lens group further comprises a fourth lens adjacent to the miniature image display
- the effective focal length f 32 of the fourth lens and the effective focal length f w of the eyepiece optical system respectively satisfy the following relation (4):
- the third lens group is composed of two optical lenses, wherein the lens adjacent to the micro image display is a fourth lens.
- the first lens is an aspherical lens.
- the reflecting unit is a sheet having a reflective function, the sheet comprising a base layer and a reflective coating layer, the base layer being glass, plastic or other inorganic material.
- the reflecting unit is an optical prism.
- the optical surface of the first lens adjacent to the reflecting unit side is a flat surface.
- the optical surface of the second lens adjacent to the reflecting unit side is a flat surface.
- the eyepiece optical system of the present invention wherein: the fourth lens is adjacent to the optical surface of the miniature image display concave to the miniature image display.
- an optical plane of the first lens is glued to an adjacent plane of the optical prism, or an optical plane of the second lens is glued to an adjacent plane of the optical prism, Or the first lens, the second lens and the optical prism are glued together.
- the turning angle ⁇ of the reflecting unit to the optical axis of the eyepiece optical system satisfies the following relation (6):
- the effective focal length f 11 of the first lens further satisfies the following relation (7):
- an effective focal length f 21 of the second lens, an effective focal length f 31 of the third lens, and an effective focal length f 32 of the fourth lens further satisfy the following relationship (8) ), (9) and (5):
- the material of the first lens, the second lens and the third lens is a glass material or a plastic material.
- a PBS prism or a sheet type PBS is provided between the third lens group and the micro image display in the optical axis direction.
- the present invention also provides another head mounted display device comprising a miniature image display unit and an eyepiece, the eyepiece being located between the human eye and the miniature image display unit, wherein: the eyepiece is any of the foregoing Eyepiece optical system.
- the head mounted display device of the present invention wherein the micro image display device is an organic electroluminescence light emitting device or a transmissive liquid crystal display or a reflective liquid crystal display.
- the head mounted display device of the present invention wherein the head mounted display device adjusts the diopter by adjusting a distance between the microdisplay and the eyepiece optical system in the optical axis direction.
- the head mounted display device of the present invention wherein the head mounted display device is a binocular head mounted display device comprising two identical eyepiece optical systems.
- the invention has the advantages that the eyepiece optical system has the advantages of compact structure, small size, high optical resolution, and the like, and the diameter of the exit pupil is larger than that of the general eyepiece; the eyepiece optical system can be used with a spherical lens and an aspheric lens, optical plastic and optical.
- the use of glass in combination in order to reduce the manufacturing cost and product weight, the system aberration is greatly eliminated, especially the optical indicators such as low distortion, low chromatic aberration, low field curvature and low astigmatism are realized, so that the observer can
- a full-frame high-definition, distortion-free, uniform image quality is obtained to achieve an optimal visual experience.
- Figure 1 is an optical path diagram of an eyepiece optical system according to a first embodiment of the present invention
- Figure 2 is a dot-column diagram of an eyepiece optical system according to a first embodiment of the present invention
- FIG. 3a is a field curvature diagram of an eyepiece optical system according to a first embodiment of the present invention
- FIG. 3b is a distortion diagram of an eyepiece optical system according to a first embodiment of the present invention
- Figure 4 is a light path diagram of an eyepiece optical system according to a second embodiment of the present invention.
- Figure 5 is a dot-column diagram of an eyepiece optical system according to a second embodiment of the present invention.
- Figure 6a is a field curvature diagram of an eyepiece optical system according to a second embodiment of the present invention
- Figure 6b is a distortion diagram of an eyepiece optical system according to a second embodiment of the present invention
- Figure 7 is a light path diagram of an eyepiece optical system according to a third embodiment of the present invention.
- Figure 8 is a dot-column diagram of an eyepiece optical system according to a third embodiment of the present invention.
- Figure 9a is a field curvature diagram of an eyepiece optical system according to a third embodiment of the present invention
- Figure 9b is a distortion diagram of an eyepiece optical system according to a third embodiment of the present invention
- Figure 10 is a light path diagram of an eyepiece optical system according to a fourth embodiment of the present invention.
- Figure 11 is a dot-column diagram of an eyepiece optical system according to a fourth embodiment of the present invention.
- Figure 12a is a field curvature diagram of an eyepiece optical system according to a fourth embodiment of the present invention
- Figure 12b is a distortion diagram of the eyepiece optical system of the fourth embodiment of the present invention
- Figure 13 is a light path diagram of an eyepiece optical system according to a fifth embodiment of the present invention.
- Figure 14 is a dot-column diagram of an eyepiece optical system according to a fifth embodiment of the present invention.
- Figure 15a is a field curvature diagram of an eyepiece optical system according to a fifth embodiment of the present invention
- Figure 15b is a distortion diagram of an eyepiece optical system according to a fifth embodiment of the present invention
- Figure 16 is a light path diagram of an eyepiece optical system according to a sixth embodiment of the present invention.
- Figure 17 is a dot-column diagram of an eyepiece optical system according to a sixth embodiment of the present invention.
- Figure 18a is a field curvature diagram of an eyepiece optical system according to a sixth embodiment of the present invention
- Figure 18b is a distortion diagram of an eyepiece optical system according to a sixth embodiment of the present invention
- Figure 19 is a light path diagram of an eyepiece optical system according to a seventh embodiment of the present invention.
- Figure 20 is a dot-column diagram of an eyepiece optical system according to a seventh embodiment of the present invention.
- Figure 21a is a field curvature diagram of an eyepiece optical system according to a seventh embodiment of the present invention
- Figure 21b is a distortion diagram of an eyepiece optical system according to a seventh embodiment of the present invention
- Figure 22 is a light path diagram of an eyepiece optical system according to an eighth embodiment of the present invention.
- Figure 23 is a dot-column diagram of an eyepiece optical system according to an eighth embodiment of the present invention.
- Fig. 24a is a field curvature diagram of an eyepiece optical system according to an eighth embodiment of the present invention
- Fig. 24b is a distortion diagram of the eyepiece optical system of the eighth embodiment of the invention.
- An eyepiece optical system for near-eye display includes a first lens, a reflection unit, a second lens, and a third lens group which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side
- the optical axes of the second lens and the third lens group are coaxial and perpendicular to the micro image display; the optical axes of the second lens and the third lens group are reflected by the reflection unit and are coaxial with the optical axis of the first lens;
- the lens group includes at least a third lens; the second lens and the third lens are optical aspherical surface type;
- the first lens is a unique lens disposed between the reflective unit and the viewing side of the human eye; the effective focal length f 11 of the first lens and
- the effective focal length fw of the eyepiece optical system satisfies the following relation (1):
- f 11 / f w values may be 0.75,4.50,1.05,2.66,1.21,1.35,0.87,1.39,1.47,1.21,1.54,1.45,1.88,1.29,1.25,1.20,1.14,1.21,1.15, 1.17, 1.25, 1.13, 1.67.
- the effective focal length f 21 of the second lens, the effective focal length f 31 of the third lens, and the effective focal length f w of the eyepiece optical system satisfy the following relations (2) and (3):
- f 21 /f w may be -0.28, -0.93, -0.49, -0.59, -397.60, -0.72, -0.38, -0.69, -0.58, 8.00, -0.45, -0.76, -2.42 -0.61, -0.67, -0.69, -0.57;
- f 31 /f w may be 0.39, 0.47, 0.55, 0.45, 0.50, 0.46, 0.40, 0.53, 0.97, 0.48, 0.53, 0.57.
- the range of values of f 21 /f w and f 31 /f w is closely related to the correction of the system aberration, the difficulty of processing the optical element, and the sensitivity of the optical component assembly deviation.
- the system aberrations are sufficiently corrected to achieve superior optical effects and improve the processability of the optical components in the system.
- the third lens group is composed of two optical lenses, further including a fourth lens close to the micro image display, and the fourth lens can better correct field curvature and astigmatism, thereby facilitating a larger field of view. And higher optical resolution.
- the following relationship is satisfied between the effective focal length f 32 of the fourth lens and the effective focal length fw of the eyepiece optical system:
- the value of f 32 /f w may be 0.8, -3.79, 5.93, -0.45, -0.47, 0.55, 0.97, 2.90, -78.5, 0.86, -1.62, 0.9, 5.79, 14.93, -6.45, - 1.47, 1.55, 1.97, 0.90, -0.5, -0.82, -0.62.
- the above relation f 32 / f w is in the range of correction of the aberration, are closely related to the difficulty of processing the optical element, and the assembly variation of sensitivity of the optical element, so that the aberration is sufficiently corrected, thereby achieving high-quality optical effect, The processability of the optical components in the system is improved.
- the first lens L1, the prism P, the second lens L2, the third lens L3, and the fourth lens L4 are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, and the reflection unit P
- the reflecting surface is R.
- the light emitted from the micro image display passes through the fourth lens, the third lens, the second lens, the reflection unit, and the first lens, and then enters the human eye.
- the distortion of the system is well corrected by using the second lens and the third lens of the optical aspherical surface type.
- the eyepiece optical system of the above-mentioned embodiment of the present invention is designed by the combination of the first positive lens and the reflection unit to increase the effective field of view of the system.
- the size of the system is controlled to a large extent.
- the design of the second lens and the third lens group, and the design of the optical aspherical surface type, the aberration of the system is well corrected, and the effective range of 24° to 30° can be realized.
- the field of view angle while the full-frame C-line and F-line color difference is less than 0.08mm, at the same time achieve a compact system structure, large field of view, high optical resolution Optical properties such as rate and low distortion are beneficial for long-term comfortable viewing.
- the second lens in the above embodiment is adjacent to the optical surface of the micro image display side to the direction of the micro image display, the optical surface of the first lens near the viewing side of the human eye is convex toward the human eye, and the fourth lens is close to the micro image display.
- the optical surface is concave to the micro image display, which is more conducive to reducing the size of the optical system, so that it can reach the maximum angle of view under the same size, improve the image quality, improve the astigmatism and field curvature of the system, and benefit the eyepiece.
- the system achieves high-resolution optical effects of uniform image quality in full frame.
- the first lens is an aspherical lens.
- the expression of the aspheric surface is of the formula (a):
- z is the vector height of the optical surface
- c is the curvature at the aspherical vertex
- k is the aspherical coefficient
- ⁇ 2, 4, 6... are the coefficients of each order
- r is the distance coordinate of the point on the curved surface to the optical axis of the lens system.
- the reflecting unit is an optical reverse film or a mirror, and the mirror or the reflecting film can reduce the manufacturing cost and reduce the total weight of the system.
- the reflecting unit adopts an optical prism, which can better correct the aberration performance of the optical system.
- the optical surface of the first lens near the reflection unit side is a plane; and the optical surface of the second lens near the reflection unit side is a plane.
- the optical plane of the first lens is glued to the adjacent plane of the optical prism, or the optical plane of the second lens is glued to the adjacent plane of the optical prism, or the first lens and the second lens And optical prisms are glued together.
- the turning angle ⁇ of the reflecting unit to the optical axis of the eyepiece optical system may be any angle of 0-180°.
- the turning angle ⁇ of the reflecting unit to the optical axis of the eyepiece optical system satisfies the following relation (6):
- the effective focal length f 11 of the first lens further satisfies the following relation (7):
- f 11 / f w values may be 1.05,1.22,1.36,0.89,1.49,1.47,1.21,1.54,1.45,1.88,1.29,1.25,1.20,1.14,1.67,2.10,2.21,2.32,2.68.
- the range of f 11 /f w is closely related to the correction of the system aberration, the difficulty of processing the optical component, and the sensitivity of the optical component assembly deviation, so that the system aberration is sufficiently corrected, thereby realizing High quality optical effects and improved processability of optical components in the system.
- the effective focal length f 21 of the second lens, the effective focal length f 31 of the third lens, and the effective focal length f 32 of the fourth lens further satisfy the following relations (8), (9) and (5):
- f 21 /f w may be -0.93, -0.50, -0.59, -397.60, -0.72, -0.38, -0.58, -0.45, -0.76, -2.42, -0.62, -0.68, -0.57
- the value of f 31 /f w may be 0.47, 0.55, 0.41, 0.50, 0.46, 0.53, 0.48, 0.57; the value of f 32 /f w may be -3.79, 5.93, 0.97, 2.90, -78.5, 0.86. , -1.62, 0.9, 5.79, 14.93, -6.45, -1.47, 1.55, 1.97, 0.90, -0.82.
- the materials of the first lens, the second lens and the third lens are glass materials or plastic materials.
- a PBS Polarization Beam Splitter
- a sheet type is arranged along the optical axis direction between the third lens group and the micro image display.
- PBS which is used in conjunction with an LED source, provides illumination to the LCOS display.
- the light emitted from the micro image display passes through the fourth lens, the third lens, the second lens, the reflection unit, and the first lens, and then enters the human eye.
- the aperture E can be used to image the eyepiece optical system, which is a virtual light-emitting aperture.
- the dot-column diagram provided in the following embodiments reflects the geometry of the optical system imaging, ignoring the diffraction effect, and specifying the field of view, the speckle pattern formed by the focused wavelength ray focusing image plane section, and can include multiple fields of view and multiple wavelengths simultaneously. The light.
- the intensity of the optical system imaging quality can be directly measured by the intensity and shape of the speckle pattern, and the chromatic aberration of the optical system can be visually measured by the degree of dislocation of the different wavelength dispersion spots in the dot pattern.
- Embodiment 1 A schematic diagram of an optical path structure of an eyepiece optical system, as shown in FIG. 1, includes a first lens L1, a mirror or a reflective film which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side (ie, a reflection unit), a second lens L2, a third lens L3, and a fourth lens L4.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a plano-convex positive lens
- the second lens L2 is a meniscus-shaped negative lens
- the third lens L3 is a biconvex positive lens
- the fourth lens is a biconcave-shaped negative lens.
- the distortion, chromatic aberration, field curvature and the like of the system can be sufficiently corrected, and sufficient forward power can be provided with a small volume, and the angle of view reaches 29°.
- FIG. 2 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of Embodiment 1. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 3(a) and 3(b) respectively show field curvature and distortion curves of the eyepiece according to Embodiment 1 of the present invention, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 2 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 4, includes a first lens L1 and a prism P (ie, a reflection unit) which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a double convex positive lens
- the second lens L2 is a meniscus shaped negative lens
- the third lens L3 is a biconvex positive lens
- the fourth lens is a meniscus shaped negative lens.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and curvature of field of the system, and provide sufficient forward power with a small angle of field, and the angle of view reaches 28°.
- FIG. 5 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of Embodiment 2. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 6(a) and 6(b) respectively show field curvature and distortion curves of the eyepiece according to Embodiment 2 of the present invention, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 3 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 7, includes a first lens L1, a prism P, and a second lens L2 which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a plano-convex positive lens
- the second lens L2 is a meniscus-shaped negative lens
- the third lens L3 is a biconvex positive lens
- the fourth lens is a biconcave negative lens, of which the first lens The lens is glued to the reflective unit.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and field curvature of the system, and provide sufficient forward power with a small angle of field, and the angle of view reaches 29°.
- FIG. 8 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of the present embodiment. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 9(a) and 9(b) respectively show field curvature and distortion curves of the eyepiece according to the present embodiment, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 4 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 10, includes a first lens L1, a prism P, and a second lens L2 which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a meniscus-shaped positive lens
- the second lens L2 is a meniscus-shaped negative lens
- the third lens L3 is a biconvex positive lens
- the fourth lens is a meniscus-shaped negative lens.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and curvature of field of the system, and provide sufficient forward power with a small field of view, and the angle of view reaches 27°.
- FIG. 11 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of the present embodiment. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 12(a) and 12(b) respectively show field curvature and distortion curves of the eyepiece according to the present embodiment, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 5 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 13, includes a first lens L1, a prism P, and a second lens L2 which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 from left to right), and the surface of the display I is 13
- the reflecting surface of the reflecting unit is R.
- the first lens L1 is a plano-convex positive lens
- the second lens L2 is a meniscus-shaped negative lens
- the third lens L3 is a meniscus-shaped positive lens
- the fourth lens is a meniscus positive lens
- the fourth lens A PBS prism set is disposed between the L4 and the display device, including phase bonding
- the first PBS prism P2 and the second PBS prism P3, whose reflective surface is recorded, can be used to illuminate the microdisplay.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and curvature of field of the system, and provide sufficient forward power with a field angle of 24° while ensuring a small volume.
- FIG. 14 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of the present embodiment. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 15(a) and 15(b) respectively show field curvature and distortion curves of the eyepiece according to the present embodiment, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 6 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 16, includes a first lens L1, a prism P, and a second lens L2 which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a plano-convex positive lens
- the second lens L2 is a plano-concave negative lens
- the third lens L3 is a biconvex positive lens
- the fourth lens is a meniscus-shaped positive lens, of which the first lens
- the lens L1 is cemented with the prism P
- the prism P is cemented with the second lens L2.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and field curvature of the system, and provide sufficient forward power with a small field of view, and the angle of view reaches 25°.
- FIG. 17 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of the present embodiment. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 18(a) and 18(b) respectively show field curvature and distortion curves of the eyepiece according to the present embodiment, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 7 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 19, includes a first lens L1, a prism P, and a second lens L2 which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a biconvex positive lens
- the second lens L2 is a biconvex negative lens
- the third lens L3 is a meniscus positive lens
- the fourth lens is a meniscus positive lens.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and field curvature of the system, and provide sufficient forward power with a small field of view, and the angle of view reaches 26°.
- FIG. 20 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of the present embodiment. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 21(a) and 21(b) respectively show field curvature and distortion curves of the eyepiece according to the present embodiment, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Embodiment 8 Schematic diagram of the optical path structure of the eyepiece optical system, as shown in FIG. 22, includes a first lens L1, a prism P, and a second lens L2 which are arranged coaxially in the optical axis direction from the human eye observation side to the micro image display device side.
- the optical surface number near the side of the pupil E is 1, and so on (2, 3, 4, 5, 6, 7, 8, 9, 10 from left to right), the surface of the display I is 13, the reflection unit
- the reflecting surface is R.
- the first lens L1 is a plano-convex positive lens
- the second lens L2 is a meniscus-shaped negative lens
- the third lens L3 is a biconvex positive lens
- the fourth lens is a reverse meniscus-shaped negative lens.
- the optical structure can sufficiently correct aberrations such as distortion, chromatic aberration and curvature of field of the system, and provide sufficient forward power with a small angle of field, and the angle of view reaches 28°.
- FIG. 23 is a schematic diagram of a point-and-column diagram of the eyepiece optical system of the present embodiment. It can be seen that the diffuse spot radius of each field of view light in the image plane (display device I) is small and uniform, and different wavelengths of light are in the same The degree of dislocation of the diffuse formed by the field of view is low, the aberration of the optical system is well corrected, and the overall uniform and high optical performance display image can be observed through the eyepiece optical system.
- 24(a) and 24(b) respectively show field curvature and distortion curves of the eyepiece according to the present embodiment, which characterize the large field of view and high image quality of the optical system of the present embodiment.
- Example 1 1.21 -397.60 -7.48 0.61 -0.45
- Example 2 1.29 -0.61 0.48 0.55 -78.50
- Example 3 1.39 -0.69 0.50 0.41 -0.93
- Example 4 4.50 -0.93 0.46 0.48 -3.79
- Example 5 1.47 -0.58 0.46 0.83 0.97
- Example 6 1.54 -0.45 0.40 0.49 2.90
- Example 7 0.75 -0.28 0.39 0.70 0.80
- Example 8 1.25 -0.67 0.53 0.48 -1.63
- another head mounted display device comprising a miniature image display unit and an eyepiece, the eyepiece being located between the human eye and the miniature image display unit, wherein: the eyepiece is implemented in any of the foregoing The eyepiece optical system described in the example.
- the miniature image display is an organic electroluminescent light emitting device or a transmissive liquid crystal display or a reflective liquid crystal display.
- the head mounted display device adjusts the diopter by adjusting the distance between the microdisplay and the eyepiece optical system in the optical axis direction.
- the head mounted display device is a binocular head mounted display device comprising two identical eyepiece optical systems as described above.
- the eyepiece optical system of the above embodiments of the present invention has the advantages of compact structure, small size, high optical resolution, and the like, and the diameter of the exit pupil is larger than that of the general eyepiece; the eyepiece optical system can be used with a spherical lens and an aspherical lens.
- the combination of optical plastic and optical glass enables the systematic elimination of system aberrations on the basis of reducing manufacturing cost and product weight, especially at the same time achieving optical indicators such as low distortion, low chromatic aberration, low field curvature, and low astigmatism.
- the observer can use the eyepiece optical system of the present invention to view a full-frame high-definition, distortion-free, uniform image with a uniform image to achieve an optimal visual experience.
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Abstract
Description
f11/fw | f21/fw | f3/fw | f31/fw | f32/fw | |
实施例1 | 1.21 | -397.60 | -7.48 | 0.61 | -0.45 |
实施例2 | 1.29 | -0.61 | 0.48 | 0.55 | -78.50 |
实施例3 | 1.39 | -0.69 | 0.50 | 0.41 | -0.93 |
实施例4 | 4.50 | -0.93 | 0.46 | 0.48 | -3.79 |
实施例5 | 1.47 | -0.58 | 0.46 | 0.83 | 0.97 |
实施例6 | 1.54 | -0.45 | 0.40 | 0.49 | 2.90 |
实施例7 | 0.75 | -0.28 | 0.39 | 0.70 | 0.80 |
实施例8 | 1.25 | -0.67 | 0.53 | 0.48 | -1.63 |
Claims (17)
- 一种用于近眼显示的目镜光学系统,其特征在于,包括从人眼观察侧到微型图像显示器件侧沿光轴方向共轴依次排列的第一透镜、反射单元、第二透镜和第三透镜组;所述第二透镜和第三透镜组的光轴共轴,且垂直于微型图像显示器;所述第二透镜和第三透镜组的光轴经过反射单元反射后与第一透镜的光轴共轴;所述第三透镜组至少包括第三透镜;所述第二透镜和所述第三透镜为光学非球面面型;所述第一透镜为设置于所述反射单元与人眼观察侧之间的唯一透镜;所述第一透镜的有效焦距f11、所述第二透镜的有效焦距f21和所述第三透镜的有效焦距f31分别与所述目镜光学系统的有效焦距fw之间满足以下关系式(1)、(2)和(3):0.75<f11/fw<4.5 (1);f21/fw<-0.28 (2);0.33<f31/fw<0.83 (3);所述第一透镜靠近人眼观察侧的光学表面凸向人眼观察方向;所述第二透镜靠近微型图像显示器侧的光学表面凹向微型图像显示器方向;所述第三透镜为双凸透镜;其中,所述第三透镜组进一步包括靠近微型图像显示器的第四透镜;所述第四透镜的有效焦距f32与所述目镜光学系统的有效焦距fw之间满足以下关系式(4):|f32/fw|>0.45 (4)。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述第一透镜为非球面透镜。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述反射单元为具有反射功能的薄片,所述薄片包括基底层和反射镀膜层,所述基底层为玻璃、塑料或其他无机材料。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述反射单元为光学棱镜。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述第一透镜靠近反射单元侧的光学表面为平面。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述第二透镜靠近反射单元侧的光学表面为平面。
- 根据权利要求1所述目镜光学系统,其特征在于:所述第四透镜靠近微型图像显示器的光学表面凹向微型图像显示器。
- 根据权利要求4、5或6所述的目镜光学系统,其特征在于:所述第一透镜的光学平面 与所述光学棱镜的相邻平面胶合,或所述第二透镜的光学平面与所述光学棱镜的相邻平面胶合,或所述第一透镜、第二透镜和光学棱镜两两胶合。
- 根据权利要求3或4所述的目镜光学系统,其特征在于:所述反射单元对所述目镜光学系统光轴的转折角θ满足以下关系式(6):θ=90° (6)。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述第一透镜的有效焦距f11进一步满足以下关系式(7):1.05<f11/fw<2.68 (7)。
- 根据权利要求1所述目镜光学系统,其特征在于:所述第二透镜的有效焦距f21、所述第三透镜的有效焦距f31和所述第四透镜的有效焦距f32进一步满足以下关系式(8)、(9)和(5):f21/fw<-0.38 (8);0.41<f31/fw<0.58 (9);|f32/fw|>0.86 (5)。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述第一透镜、第二透镜和第三透镜的材料为玻璃材料或者塑料材料。
- 根据权利要求1所述的目镜光学系统,其特征在于:所述第三透镜组和微型图像显示器之间,沿光轴方向有PBS棱镜或薄片型PBS。
- 一种头戴显示装置,包括微型图像显示单元和目镜,所述目镜位于人眼与所述微型图像显示单元之间,其特征在于:所述目镜为权利要求1至13中任一项所述的目镜光学系统。
- 根据权利要求14所述的头戴显示装置,其特征在于,所述微型图像显示器是有机电致发光发光器件或透射式液晶显示器或反射式液晶显示器。
- 根据权利要求15所述的头戴显示装置,其特征在于,所述头戴显示装置通过调整微型显示器和目镜光学系统之间沿光轴方向的距离来调节屈光度。
- 根据权利要求16所述的头戴显示装置,其特征在于,所述头戴显示装置是包含两个相同的上述目镜光学系统的双目头戴显示装置。
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US15/744,249 US10302906B2 (en) | 2016-04-20 | 2016-04-20 | Eyepiece optical system for near-eye display, and head-mounted display device |
CN201680073516.6A CN108474946B (zh) | 2016-04-20 | 2016-04-20 | 用于近眼显示的目镜光学系统及头戴显示装置 |
PCT/CN2016/079724 WO2017181360A1 (zh) | 2016-04-20 | 2016-04-20 | 用于近眼显示的目镜光学系统及头戴显示装置 |
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US20230088184A1 (en) * | 2021-09-16 | 2023-03-23 | Yoshifumi Sudoh | Propagation optical system, virtual image display apparatus, and head-mounted display |
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US10606070B2 (en) * | 2016-09-19 | 2020-03-31 | Genius Electronic Optical Co., Ltd. | Ocular optical system |
CN108107572B (zh) * | 2016-11-25 | 2020-07-14 | 中强光电股份有限公司 | 近眼显示装置 |
JP7086581B2 (ja) * | 2016-12-21 | 2022-06-20 | キヤノン株式会社 | 観察光学系及びそれを有する観察装置 |
CN107861247B (zh) * | 2017-12-22 | 2020-08-25 | 联想(北京)有限公司 | 光学部件及增强现实设备 |
CN109491049B (zh) * | 2018-12-26 | 2023-08-29 | 歌尔光学科技有限公司 | 投影光学系统及具有其的增强现实眼镜 |
KR20200114860A (ko) * | 2019-03-29 | 2020-10-07 | 삼성전자주식회사 | 광각 고해상도 거리 측정 장치 |
CN111856767B (zh) | 2019-04-24 | 2022-09-23 | 信泰光学(深圳)有限公司 | 测距仪及其显示器镜组装置 |
US11668902B2 (en) | 2019-09-27 | 2023-06-06 | Sintai Optical (Shenzhen) Co., Ltd. | Lens assembly |
TWI704387B (zh) * | 2020-03-05 | 2020-09-11 | 信泰光學(深圳)有限公司 | 成像鏡頭(四十四) |
CN113031279A (zh) * | 2021-04-12 | 2021-06-25 | 北京耐德佳显示技术有限公司 | 一种出瞳形状为长方形的近眼显示装置 |
CN114236864A (zh) * | 2021-11-23 | 2022-03-25 | 青岛歌尔声学科技有限公司 | 光学模组及头戴显示设备 |
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