CN106291939B - A kind of virtual reality display optical system - Google Patents
A kind of virtual reality display optical system Download PDFInfo
- Publication number
- CN106291939B CN106291939B CN201610871413.6A CN201610871413A CN106291939B CN 106291939 B CN106291939 B CN 106291939B CN 201610871413 A CN201610871413 A CN 201610871413A CN 106291939 B CN106291939 B CN 106291939B
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- China
- Prior art keywords
- convex lens
- front surface
- rear surface
- virtual reality
- optical system
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Classifications
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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
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
Abstract
This application discloses a kind of virtual reality display optical systems, including the liquid crystal display, lens combination and diaphragm set gradually along optical axis direction, the light that the liquid crystal display issues is incident to the diaphragm after lens combination refraction and then enters human eye eye pupil, the lens combination includes: convex lens, the convex lens front surface opposite with the diaphragm is Fresnel surface, convex lens rear surface be it is aspherical, the convex lens front surface and the convex lens rear surface have predetermined angle inclination relative to the pitch orientation perpendicular to eye pupil optical axis；Meniscus lens, meniscus lens front surface is opposite with the convex lens rear surface, and meniscus lens rear surface is opposite with the liquid crystal display.Optical aberration can be corrected and reduced well, small optical aberration good imaging quality promotes image quality, meanwhile, Fresnel and aspherical lens combination formation optical path are contained by this optical system and visual field is expanded by the optimization design of software.
Description
Technical field
The present invention relates to optical technical fields, more specifically to a kind of virtual reality display optical system.
Background technique
Currently, the key Design point for having to consider when virtual reality display Optical System Design be big visual field, it is high thoroughly
Cross rate, high-performance.Big view field imaging is conducive to virtual implementing helmet wearer and experiences high-immersion, and can provide number abundant
According to information content, high transmittance is conducive to improve the efficiency of light energy utilization of image source module, under same visual brightness, image source module
Output power is low, is equipped with after lithium battery and is provided to that wearer is longer using the time, and high-performance is embodied in optical system itself
Optical property feature, for virtual reality display optical system, main includes distort easy correcting property, main screw lift body
It accumulates small and exquisite, highly integrated etc..
There are mainly two types of virtual reality display optical system is divided from optical texture: coaxial-type and off-axis formula.Wherein, from
Shaft type virtual reality display optical system mostly uses catadioptric optical structure, by eye pupil front end combiner, relay imaging light
System composition.Eye pupil front end combiner uses face type for spherical surface or non-spherical reflector, is coated with specific film layer and realizes that vision increases
Enhance function by force or virtually；Relay imaging optical system uses the combination of transmission optical component, the inclination and bias of transmissive element
Conducive to correction astigmatism, distortion, transmission wedge-shaped element is conducive to now positive coma, astigmatism, chromatic longitudiinal aberration, also wraps in relay optical system
Diffraction element is included, its spectrum level Diffraction fringe distribution correction chromatic longitudiinal aberration, second order spectrum etc., expander graphs image source visual color letter are utilized
Breath.Coaxial virtual reality display optical system mostly uses rotational symmetry transmissive element, has and processes relatively easy, imaging viewing field
The characteristics of being of moderate size.In addition, it is not tight to aspherical types coefficient precision in coaxial system when TOLERANCE ANALYSIS, be conducive to digital controlled rotary
Rubbing down, mirror interval and angle of wedge tolerance are also more loose, and high-volume is suitble to process.
However, virtual reality display optical system in the prior art has the aberrations such as the vertical axis such as coma, astigmatism, because
This, how to reduce the aberration of virtual reality display optical system is that those skilled in the art are badly in need of technical problems to be solved.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of virtual reality display optical system, can reduce virtual
The aberration of reality displays optical system.
To achieve the above object, the invention provides the following technical scheme:
A kind of virtual reality display optical system, including set gradually along optical axis direction liquid crystal display, lens group
Close and diaphragm, the light that the liquid crystal display issues be incident to after the lens combination refraction diaphragm so that into
Enter human eye eye pupil, the lens combination includes:
Convex lens, the convex lens front surface opposite with the diaphragm are Fresnel surface, and convex lens rear surface is aspherical, institute
Stating convex lens front surface and the convex lens rear surface has predetermined angle relative to the pitch orientation perpendicular to eye pupil optical axis
Inclination；
Meniscus lens, meniscus lens front surface is opposite with the convex lens rear surface, meniscus lens rear surface and the liquid
Crystal display screen is opposite.
Preferably, in above-mentioned virtual reality display optical system, the front surface and rear surface of the meniscus lens
Be it is aspherical, the front surface and rear surface of the meniscus lens relative to the pitch orientation perpendicular to eye pupil optical axis
State predetermined angle inclination.
Preferably, in above-mentioned virtual reality display optical system, the Fresnel center of the convex lens front surface
Domain etching depth range is 0.001mm~0.0014mm, and etching edge depth bounds are 0.0014mm~0.0018mm.
Preferably, in above-mentioned virtual reality display optical system, the Fresnel surface type Z of the convex lens front surface1
Are as follows:
The aspherical face type Z of the convex lens rear surface2Are as follows:
Wherein, c is vertex curvature, and for the front surface or rear surface that r is the convex lens to optical axis standoff height, K is circle
Constant is bored,For rotational symmetry high-order coefficient, N is positive integer, and i is positive integer.
Preferably, in above-mentioned virtual reality display optical system, the convex lens rear surface and the meniscus lens
The range accuracy range of front surface is 0.01mm-0.02mm, the meniscus lens rear surface and the liquid crystal display center
Distance range is 0.02mm-0.03mm.
Preferably, in above-mentioned virtual reality display optical system, the convex lens front surface and the diaphragm away from
It is 12mm-14mm from range.
Preferably, in above-mentioned virtual reality display optical system, the convex lens front surface and the liquid crystal display
The distance of screen is less than or equal to 77mm.
It can be seen from the above technical proposal that a kind of virtual reality display optical system provided by the present invention, including
Liquid crystal display, lens combination and the diaphragm set gradually along optical axis direction, the light that the liquid crystal display issues pass through
The diaphragm is incident to after the lens combination refraction and then enters human eye eye pupil, and the lens combination includes: convex lens, with institute
State the opposite convex lens front surface of diaphragm be Fresnel surface, convex lens rear surface be it is aspherical, the convex lens front surface and
The convex lens rear surface has predetermined angle inclination relative to the pitch orientation perpendicular to eye pupil optical axis；Meniscus lens, bent moon
Lens front surface is opposite with the convex lens rear surface, and bent moon rear surface is opposite with the liquid crystal display.
Virtual reality display optical system provided by the invention, lens combination convexity lens front surface are Fresnel surface,
Convex lens rear surface be it is aspherical, it is such aspherical to correct well and reduce light with Fresnel surface combination surface structure
Aberration is learned, is specifically capable of the vertical axial aberrations such as coma, the astigmatism of correct influences image quality, small optical aberration good imaging quality,
Image quality is promoted, low distorted optical image quality can make wearer's binocular experience high-immersion and Gao Liti when watching image
Sense.
Meanwhile Fresnel is contained with aspherical lens combination formation optical path and by the excellent of software by this optical system
Change design and expands visual field.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of virtual reality display schematic diagram of optical system provided in an embodiment of the present invention；
Fig. 2 be another embodiment of the present invention provides 45 ° × 40 ° ranges of virtual reality display optical system central vision
Distortion figure；
Fig. 3 be another embodiment of the present invention provides 85 ° × 80 ° ranges of virtual reality display optical system full filed it is abnormal
Become figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is a kind of virtual reality display schematic diagram of optical system provided in an embodiment of the present invention.
In a specific embodiment, a kind of virtual reality display optical system is provided, including along optical axis direction
Liquid crystal display 04, lens combination and the diaphragm 01 set gradually, described in the light that the liquid crystal display 04 issues passes through
It is incident to the diaphragm 01 after lens combination refraction and then enters human eye eye pupil, the lens combination includes: convex lens 02, with institute
State the opposite convex lens front surface of diaphragm 01 be Fresnel surface, convex lens rear surface be it is aspherical, the convex lens front surface with
And the convex lens rear surface has predetermined angle inclination relative to the pitch orientation perpendicular to eye pupil optical axis；Meniscus lens 03,
Meniscus lens front surface is opposite with the convex lens rear surface, and meniscus lens rear surface and the liquid crystal display 04 are opposite.
Wherein, convex lens is same as meniscus lens is sequentially placed along the optical axis direction, due to liquid crystal display 04
Central axis and eye pupil optical axis are not coaxial, therefore, convex lens non-rotational symmetry, and table after convex lens front surface and the convex lens
There is predetermined angle inclination in face relative to the pitch orientation perpendicular to eye pupil optical axis, is that the two is not coaxial to be made in order to preferably correct
At aberration asymmetric distribution caused by image quality degradation.
Liquid crystal display 04 is used as virtual reality display image forming source, and supported full-size is diagonal line length
4.5 inches, liquid crystal display 04 includes two pieces of LCD screens, upright in parallel to be placed in front of human eye, so that two eyes are distinguished
Watched attentively, liquid crystal display 04 forms binary channels LCD screen.LCD screen can be image planes LCD, the work for the light that image planes LCD is issued
Make wave-length coverage 450nm~650nm.
When backlight is analyzed, Entry pupil diameters 10mm, entrance pupil central projection to image planes LCD lower edge 32mm, entrance pupil center is thrown
Shadow is to image planes LCD top edge 50mm, so that optical system field of view angle is 85 ° × 80 °.Two LCD screen center distance between axles are greater than
70mm, binary channels LCD screen can be with laid parallel before human eye when ensure that binocular imaging, while using mainstream high definition panchromatic 4.5
When inch LCD screen, monocular pixel resolution reaches 1800 × 1700.Preferably, convex lens 02 uses Chinese glass in lens group
HQK3, meniscus lens 03 use Chinese glass HZF6, and the aspherical quadratic coefficients precision controlling being applied in lens group is at thousand points
Eight, face type PV control at 0.8 micron.
Wherein, as shown in Figures 2 and 3, Fig. 2 be another embodiment of the present invention provides virtual reality display optical system in
45 ° × 40 ° range distortion figures of heart visual field；Fig. 3 be another embodiment of the present invention provides virtual reality display optical system it is complete
85 ° × 80 ° range distortion figures of visual field.Within the scope of 45 ° × 40 ° imaging viewing fields, maximum distortion 3.12%, average distortion
0.783%；Within the scope of 85 ° × 80 ° imaging viewing fields, maximum distortion 22.69%, average distortion 5.2%.Full filed is at barrel-shaped abnormal
Become, the distortion of horizontal and pitch orientation is symmetrical, only changes image shape because distortion does not influence image definition, passes through Computer Compensation
Well-corrected can be carried out, therefore, is not further added by the correction that optical element carries out residual distortion.
In the present embodiment, convex lens 02 is 03 surface face shape parameter of meniscus lens, element material, each optic thickness, each
Optical surface spacing is as shown in table 1.
Table 1
Virtual reality display optical system provided by the invention, lens combination convexity lens front surface are Fresnel surface,
Convex lens rear surface be it is aspherical, it is such aspherical to correct well and reduce light with Fresnel surface combination surface structure
Aberration is learned, is specifically capable of the vertical axial aberrations such as coma, the astigmatism of correct influences image quality, small optical aberration good imaging quality,
Image quality is promoted, low distorted optical image quality can make wearer's binocular experience high-immersion and Gao Liti when watching image
Sense.
Meanwhile Fresnel is contained with aspherical lens combination formation optical path and by the excellent of software by this optical system
Change design and expands visual field.
On the basis of above-mentioned virtual reality display optical system, 03 front surface of meniscus lens and the bent moon
Lens rear surface be it is aspherical, 03 front surface of meniscus lens and 03 rear surface of the meniscus lens relative to perpendicular to
The pitch orientation of eye pupil optical axis has the predetermined angle to tilt.
Wherein, predetermined angle range is smaller, 03 front surface of meniscus lens and the inclination of 03 rear surface of the meniscus lens
Angle is respectively 2 ° and 1 °.
On the basis of above-mentioned virtual reality display optical system, the Fresnel center of 02 front surface of convex lens
Domain etching depth range is 0.001mm~0.0014mm, and range is 0.0014mm~0.0018mm.
On the basis of above-mentioned virtual reality display optical system, the Fresnel surface type Z of 02 front surface of convex lens1
Are as follows:
The aspherical face type Z of 02 rear surface of convex lens2Are as follows:
Wherein, c is vertex curvature, and r is that 02 front surface of convex lens or 02 rear surface of the convex lens are thrown to optical axis
Shadow height, K are the constant of the cone,For rotational symmetry high-order coefficient, N is positive integer, and i is positive integer.
On the basis of above-mentioned virtual reality display optical system, 02 rear surface of convex lens and the meniscus lens 03
The distance range of front surface is 0.01mm-0.02mm, 03 rear surface of meniscus lens and 04 center of liquid crystal display
Distance range is in 0.02mm-0.03mm.
Further, the distance range of 02 front surface of convex lens and the diaphragm 01 is 12mm-14mm.Distance range
Make human eye eyelashes for 12mm-14mm and convex lens 02 can be encountered, does not influence wear comfort, while meeting this paper image quality
Optical System Design it is sufficiently complex and structure is big and heaviness is unfavorable for the marketization.
Further, in order to allow users to wear the headgear system for a long time, the preceding pendant sense generated is worn in reduction,
In above-mentioned virtual reality display optical system, 02 front surface of convex lens be less than at a distance from the liquid crystal display 04 or
Person is equal to 77mm, optical system weight 96.65g.The distance between convex lens 02 and liquid crystal display 04 are reduced, and then reduced
The volume of optical system reduces optical system quality.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. a kind of virtual reality display optical system, including liquid crystal display, the lens combination set gradually along optical axis direction
And diaphragm, the light that the liquid crystal display issues are incident to the diaphragm and then are entered after lens combination refraction
Human eye eye pupil, which is characterized in that the lens combination includes:
Convex lens, the convex lens front surface opposite with the diaphragm be Fresnel surface, convex lens rear surface be it is aspherical, it is described convex
Lens front surface and the convex lens rear surface have predetermined angle inclination relative to the pitch orientation perpendicular to eye pupil optical axis；
Meniscus lens, meniscus lens front surface is opposite with the convex lens rear surface, meniscus lens rear surface and the liquid crystal
Display screen is opposite.
2. virtual reality display optical system as described in claim 1, which is characterized in that the meniscus lens front surface with
And the meniscus lens rear surface be it is aspherical, the meniscus lens front surface and the meniscus lens rear surface relative to
There is the predetermined angle to tilt perpendicular to the pitch orientation of eye pupil optical axis.
3. virtual reality display optical system as claimed in claim 2, which is characterized in that the phenanthrene of the convex lens front surface
The central area Nie Er etching depth range be 0.001mm~0.0014mm, etching edge depth bounds be 0.0014mm~
0.0018mm。
4. virtual reality display optical system as claimed in claim 3, which is characterized in that the phenanthrene of the convex lens front surface
The face Nie Er type Z1Are as follows:
The aspherical face type Z of the convex lens rear surface2Are as follows:
Wherein, c is vertex curvature, and r is the convex lens front surface or the convex lens rear surface to optical axis standoff height, K
For the constant of the cone,For rotational symmetry high-order coefficient, N is positive integer, and i is positive integer.
5. such as the described in any item virtual reality display optical systems of Claims 1-4, which is characterized in that the convex lens
The range accuracy range of rear surface and the meniscus lens front surface is 0.01mm-0.02mm, the meniscus lens rear surface with
The distance range at the liquid crystal display center is 0.02mm-0.03mm.
6. virtual reality display optical system as claimed in claim 5, which is characterized in that the convex lens front surface and institute
The distance range for stating diaphragm is 12mm-14mm.
7. virtual reality display optical system as claimed in claim 6, which is characterized in that the convex lens front surface and institute
The distance for stating liquid crystal display is less than or equal to 77mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610871413.6A CN106291939B (en) | 2016-09-30 | 2016-09-30 | A kind of virtual reality display optical system |
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|---|---|---|---|
| CN201610871413.6A CN106291939B (en) | 2016-09-30 | 2016-09-30 | A kind of virtual reality display optical system |
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| CN106291939A CN106291939A (en) | 2017-01-04 |
| CN106291939B true CN106291939B (en) | 2019-07-09 |
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| CN201610871413.6A Expired - Fee Related CN106291939B (en) | 2016-09-30 | 2016-09-30 | A kind of virtual reality display optical system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106991924A (en) * | 2017-06-05 | 2017-07-28 | 联想(北京)有限公司 | A kind of display screen and intelligent glasses |
| CN111090159B (en) * | 2018-10-24 | 2021-10-29 | 宁波舜宇光电信息有限公司 | Optical lens, camera module, assembling method of camera module and corresponding terminal equipment |
| CN109739022A (en) * | 2019-03-19 | 2019-05-10 | 长春理工大学 | A kind of double-disk VR eyeglass |
| CN110262038B (en) * | 2019-06-06 | 2022-06-21 | 歌尔光学科技有限公司 | Optical system and virtual reality equipment with same |
| CN114236829B (en) * | 2021-11-30 | 2023-04-25 | 歌尔光学科技有限公司 | Optical system and head-mounted display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204360008U (en) * | 2014-12-17 | 2015-05-27 | 青岛歌尔声学科技有限公司 | A kind of micro-display eyepiece, wear eyepiece system and wear visual device |
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| JP2001142006A (en) * | 1999-11-16 | 2001-05-25 | Minolta Co Ltd | Eyepiece optical system and video display device |
| CN104049369A (en) * | 2014-06-28 | 2014-09-17 | 青岛歌尔声学科技有限公司 | Lens for head-mounted display equipment and head-mounted equipment |
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| CN205485070U (en) * | 2016-02-29 | 2016-08-17 | 中山联合光电科技股份有限公司 | Virtual reality's optical system |
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