CN208569194U - A kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide - Google Patents
A kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide Download PDFInfo
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- CN208569194U CN208569194U CN201821400933.XU CN201821400933U CN208569194U CN 208569194 U CN208569194 U CN 208569194U CN 201821400933 U CN201821400933 U CN 201821400933U CN 208569194 U CN208569194 U CN 208569194U
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Abstract
The utility model discloses a kind of nearly optics of the eye display devices of two-dimensional exit pupil extension waveguide.The device includes: micro display screen, eyepiece group, vertical extension waveguide assembly and horizontal extension waveguide assembly；Micro display screen and vertical extension waveguide assembly are respectively arranged on the focal plane and emitting light path of eyepiece group, and the beam collimation that eyepiece group is used to issue micro display screen is collimated light beam；Horizontal waveguide device is set on the emitting light path of vertical waveguide device；The level coupling plane of incidence is parallel with the upper bottom surface of vertical waveguide device；The collimated light beam that vertical extension waveguide assembly is used to for eyepiece group being emitted increases in vertical equivalent dimension；Horizontal waveguide device obtains two-dimensional expansion light beam and is emitted to human eye eye pupil for will vertically extend the increase of beam level equivalent dimension.The utility model can reduce the volume of device while expanding field angle, and overcome vertical axial aberration, the curvature of field and distortion the shortcomings that.
Description
Technical field
The utility model relates to optics field of display technology, especially a kind of two-dimensional exit pupil extends the nearly optics of the eye of waveguide and shows
Device.
Background technique
Head-mounted display (Head-mounted displays, abbreviation HMD) refers to be shown by various heads, is sent to eyes
Optical signalling, may be implemented virtual reality (Virtual Reality, VR), augmented reality (Augmented Reality, AR),
The different-effects such as mixed reality (Mix reality, MR), are widely used in virtual reality system, to enhance user's
Visual immersion.In optical display, the head-mounted display for augmented reality can allow people checking ambient enviroment
Meanwhile virtual image is projected into human eye, the virtual image of projection can be superimposed upon on the real world of user's perception, in army
Thing, industry, amusement, medical treatment, the fields such as communications and transportation have great significance.
Transmission-type head-mounted display currently used for augmented reality, if it is desired to expand field angle, inevitably result in optics
The increase of display device volume, and existing head-mounted display generallys use off-axis aspheric surface and constitutes mirror-lens system, although real
Big field angle viewing is showed, but this system can generally generate very big vertical axial aberration, the curvature of field and distortion, become virtual screen
Shape influences user experience.
Utility model content
The purpose of the utility model is to provide a kind of nearly optics of the eye display devices of two-dimensional exit pupil extension waveguide, can expand
The shortcomings that reducing the volume of device while field angle, and overcoming vertical axial aberration, the curvature of field and distortion.
To achieve the above object, the utility model provides following scheme:
The nearly optics of the eye display device of a kind of two-dimensional exit pupil extension waveguide, comprising: micro display screen, vertically extends wave at eyepiece group
Lead device and horizontal extension waveguide assembly；
The micro display screen is set on the focal plane of the eyepiece group, and the vertical extension waveguide assembly is set to described
On the emitting light path of eyepiece group, the beam collimation that the eyepiece group is used to issue the micro display screen is collimated light beam and goes out
It penetrates；The horizontal waveguide device is set on the emitting light path of the vertical waveguide device；
The vertical extension waveguide assembly is by least two parallel tetragonal prisms with the horizontal extension waveguide assembly
With at least one Dove prism it is successively glued in order made of Dove prism, the horizontal coupling of the horizontal waveguide device is incident
Face is parallel with the upper bottom surface of the vertical waveguide device, the substrate of horizontal the coupling plane of incidence and the horizontal waveguide device
Plane is in 45° angle；The vertical extension waveguide assembly be used for the collimated light beam that is emitted the eyepiece group in vertical direction into
Row equivalent dimension increases, and obtains vertically extending light beam and be emitted；The horizontal waveguide device is used for the vertical extension waveguide
The vertical extension light beam of device outgoing carries out equivalent dimension increase in the horizontal direction, obtains two-dimensional expansion light beam and is emitted to people
Eye eye pupil.
Optionally, the micro display screen is Organic Light Emitting Diode, silicon based liquid crystal screen or the micro display with light-emitting function
Chip.
Optionally, the eyepiece group is made of monolithic or multi-disc lens, and the lens material is that optical glass or optics are moulded
Material, full filed range distort less than 1%.
Optionally, the vertical coupled plane of incidence material of the vertical waveguide device is optical glass, optical plastic or embossment
Grating.
Optionally, the inclined-plane of the vertical extension waveguide assembly and the horizontal extension waveguide assembly is parallel quadrangle rib
The inclined-plane of mirror is coated with the media coating wire grating of different reflectivity, and the slant reflection rate is 1%-50%, for that will receive
To light be split into two light, a parallel rays to carry out reflection propagation according to reflection law, one is carries energy
Measure the parallel rays of increase and decrease.
Optionally, the inclined-plane spacing between the adjacent bevel surfaces on multiple inclined-planes of the vertical extension waveguide assembly is set as 1-
8mm。
Optionally, two planes being parallel to each other of the horizontal extension waveguide assembly and the vertical extension waveguide assembly
Between gap setting be 0-10mm.
Optionally, the integral thickness of the horizontal extension waveguide assembly is 2mm.
According to specific embodiment provided by the utility model, the utility model discloses following technical effects:
The utility model provides a kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide, and virtual image is from micro display
Device issues, and vertical extension waveguide device, after vertical direction expands pupil, virtual image light are coupled into after eyepiece system
It is coupled into horizontal extension waveguide device, multiple quadrangle parallelogram prisms of the final virtual image light from horizontal extension waveguide device
Slant reflection output, virtual image light eventually enter into human eye, realize virtual display, will virtually show picture in real time with real generation
Boundary's scenery overlaps, and exists simultaneously in the same space, and user can watch the information of virtual screen, it can be seen that
All kinds of scene informations of real world are realizing big field angle, and big emergent pupil range while reduces device volume, solve
The contradiction that the big field angle of conventional art and device volume cannot be considered in terms of improves the shortcomings that overcoming vertical axial aberration, the curvature of field and distort
Picture display resolution.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram that the utility model two-dimensional exit pupil extends the nearly optics of the eye display device of waveguide；
Fig. 2 is the front view that the utility model two-dimensional exit pupil extends the nearly optics of the eye display device of waveguide；
Fig. 3 is the top view that the utility model two-dimensional exit pupil extends the nearly optics of the eye display device of waveguide.
Wherein, figure label are as follows: micro display screen 1, eyepiece group 2, vertical extension waveguide assembly 3 and horizontal extension waveguide dress
It sets 4, human eye eye pupil 5, incident ray 6, the vertical coupled plane of incidence 301, the horizontal coupling plane of incidence 401, vertically extend waveguide assembly
Inclined-plane 302, horizontal extension waveguide assembly inclined-plane 402, incident ray 6, the parallel rays obtained by vertically extending waveguide assembly
601, the parallel rays 602 obtained by horizontal extension waveguide assembly.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The purpose of the utility model is to provide a kind of nearly optics of the eye display devices of two-dimensional exit pupil extension waveguide, can expand
The shortcomings that reducing the volume of device while field angle, and overcoming vertical axial aberration, the curvature of field and distortion.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
Fig. 1 is the structural schematic diagram that the utility model two-dimensional exit pupil extends the nearly optics of the eye display device of waveguide；Fig. 2 is this reality
With the front view of the nearly optics of the eye display device of New Two Dimensional emergent pupil extension waveguide；Fig. 3 is that the utility model two-dimensional exit pupil extends wave
Lead the top view of nearly optics of the eye display device.
As shown in Figure 1-3, a kind of two-dimensional exit pupil extends the nearly optics of the eye display device of waveguide, comprising: micro display screen 1, eyepiece
Group 2, vertical extension waveguide assembly 3 and horizontal extension waveguide assembly 4；
The micro display screen 1 is set on the focal plane of the eyepiece group 2, and the vertical extension waveguide assembly 3 is set to
On the emitting light path of the eyepiece group 2, the beam collimation that the eyepiece group 2 is used to issue the micro display screen 1 is directional light
Beam is simultaneously emitted；The horizontal waveguide device 4 is set on the emitting light path of the vertical waveguide device 3；
The vertical extension waveguide assembly 3 is with the horizontal extension waveguide assembly 4 for by least two parallel quadrangle ribs
Dove prism made of mirror and at least one Dove prism are successively glued in order, the level of the horizontal waveguide device are coupled into
It is parallel with the upper bottom surface of the vertical waveguide device 3 to penetrate face 401, the horizontal coupling plane of incidence 401 and the horizontal waveguide
The base plane of device is in 45° angle；The vertical extension waveguide assembly 3 is for existing the collimated light beam that the eyepiece group 2 is emitted
Equivalent dimension increase is carried out in vertical direction, is obtained vertically extending light beam and is emitted；The horizontal waveguide device 4 is used for will be described
The vertical extension light beam that vertical extension waveguide assembly 3 is emitted carries out equivalent dimension increase in the horizontal direction, obtains two-dimensional expansion
Light beam is simultaneously emitted to human eye eye pupil 5.
The micro display screen 1 is Organic Light Emitting Diode, silicon based liquid crystal screen or the micro display chip with light-emitting function.
The eyepiece group 2 is made of monolithic or multi-disc lens, and the lens material is optical glass or optical plastic, full view
Field range distortion is less than 1%.
301 material of the vertical coupled plane of incidence of the vertical waveguide device 3 is optical glass, optical plastic or embossment light
Grid, parallel rays spreads into forward the vertical coupled plane of incidence 301 of vertical extension waveguide 3, according to law of refraction n1*sinI=
N2*sin θ, n1 refer to the refractive index of incident medium, and n2 refers to the refractive index of emergent medium, and I is incidence angle, refers to incident light and the plane of incidence
The angle of normal, θ are the angles of emergence, it is indicated that penetrate the angle of light Yu plane of incidence normal.
When the vertical coupled plane of incidence 301 is the surface polishing of optical glass or optical plastic, light propagation law according to
Law of refraction n1*sinI=n2*sin θ.When the vertical coupled plane of incidence 301 is relief grating, light propagation law is according to grating
Equation:
D* (n1*sinI+n2*sin θ)=m* λ, n1 refers to the refractive index of incident medium, and n2 refers to the refractive index of emergent medium, I
It is incidence angle, refers to that the angle of incident light Yu plane of incidence normal, θ are the angles of emergence, it is indicated that penetrate the angle of light Yu plane of incidence normal, d is
Refer to corresponding grating constant, m refers to diffraction time, and λ refers to corresponding wavelength of light
The inclined-plane 402 of the vertical extension waveguide assembly 3 and the horizontal extension waveguide assembly is parallel tetragonal prism
Inclined-plane, be coated with the media coating wire grating of different reflectivity, 402 reflectivity of inclined-plane is 1%-50%, preferably
10%-30%, for the light received to be split into two light, one is that putting down for reflection propagation is carried out according to reflection law
Row light, one is the parallel rays for carrying energy increase and decrease.
Inclined-plane spacing between the adjacent bevel surfaces on multiple inclined-planes of the vertical extension waveguide assembly 3 is set as 1-8mm, excellent
It is selected as 3-5mm.
Between the horizontal extension waveguide assembly 4 and two planes being parallel to each other of the vertical extension waveguide assembly 3
Gap setting be 0-10mm, preferably 0.5mm.
The integral thickness of the horizontal extension waveguide assembly 4 is 2mm, and existing extension waveguide assembly thickness can be more than
10mm。
A kind of specific work process of the nearly optics of the eye display device of two-dimensional exit pupil extension waveguide of the utility model are as follows:
Micro display screen emits beam 6, is parallel rays 601 by the collimation of eyepiece group 2；
The parallel rays 601 is irradiated to the inclined-plane 302 of the vertical extension waveguide assembly 3, and it is fixed that light defers to catadioptric
Rule, is transmitted in waveguide base internal, and light beam increases in vertical direction equivalent dimension；
Light continues to propagate, and is irradiated to the inclined-plane 402 of the horizontal extension waveguide assembly 4, and light defers to catadioptric law,
It being transmitted in waveguide base internal, equivalent dimension increases light beam in the horizontal direction, hence into human eye eye pupil.
The vertical extension waveguide assembly 4 is used to light carrying out the extension of vertical direction emergent pupil, if with vertical coupled incidence
Light beam is inputted at face 301 having a size of 4*4mm, adjacent bevel surfaces are spaced in 4mm calculating, then entrance pupil vertical direction size is 4mm, expand pupil
Size is equal to 4*4=16mm afterwards.
Parallel rays after vertically extending waveguide assembly 3 and vertically expanding pupil will sequentially enter horizontal extension waveguide assembly 4
The horizontal coupling plane of incidence 401, will be propagated according to total reflection principle and catadioptric law, final realize horizontal expands pupil function
Energy.
In horizontal extension waveguide assembly 4, the level coupling plane of incidence 401 and 4 substrate of horizontal extension waveguide bundling device are flat greatly
Angle (acute angle) a in face is between 30~80 °, it is preferable that it is 45 ° that angle a, which is arranged, in we, then 0 field rays (i.e. parallel rays
106) it is 45 ° in the incidence angle of the big plane of substrate, meets total reflection principle, parallel rays 106 is in 4 substrate of horizontal extension waveguide
Carry out total reflection propagation.Emergent pupil horizontal direction size is 4*6=24mm.
Finally, being by vertically extending the emergent pupil size that waveguide 3 and horizontal extension waveguide 4 carry out after two-dimensional exit pupil extension
24*16mm。
By analyze above it is found that if vertically extension waveguide assembly 3 inclined-plane quantity be N, horizontal extension waveguide assembly 4 it is oblique
Face quantity is M, and entrance pupil is having a size of D*D, then after two dimensional expansion pupils, emergent pupil horizontal direction size is M*D, and emergent pupil vertical direction is big
Small is N*D.
Finally, big emergent pupil size, big field of view angle light beam can enter human eye eye pupil 5, at virtual representation.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. a kind of two-dimensional exit pupil extends the nearly optics of the eye display device of waveguide characterized by comprising micro display screen, hangs down at eyepiece group
Direct expansion opens up waveguide assembly and horizontal extension waveguide assembly；
The micro display screen is set on the focal plane of the eyepiece group, and the vertical extension waveguide assembly is set to the eyepiece
On the emitting light path of group, the eyepiece group, which is used for, to be collimated light beam by the beam collimation that the micro display screen issues and is emitted；Institute
Horizontal waveguide device is stated to be set on the emitting light path of the vertical waveguide device；
The vertical extension waveguide assembly and the horizontal extension waveguide assembly are by least two parallel tetragonal prisms and extremely
Dove prism made of a few Dove prism is successively glued in order, the horizontal coupling plane of incidence of the horizontal waveguide device with
The upper bottom surface of the vertical waveguide device is parallel, the base plane of horizontal the coupling plane of incidence and the horizontal waveguide device
In 45° angle；The vertical extension waveguide assembly is used for the collimated light beam that is emitted the eyepiece group and carries out in vertical direction etc.
It imitates size to increase, obtains vertically extending light beam and be emitted；The horizontal waveguide device is used for the vertical extension waveguide assembly
The vertical extension light beam of outgoing carries out equivalent dimension increase in the horizontal direction, obtains two-dimensional expansion light beam and is emitted to human eye eye
Pupil.
2. a kind of two-dimensional exit pupil according to claim 1 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
Micro display screen is Organic Light Emitting Diode, silicon based liquid crystal screen or the micro display chip with light-emitting function.
3. a kind of two-dimensional exit pupil according to claim 1 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
Eyepiece group is made of monolithic or multi-disc lens, and the lens material is optical glass or optical plastic, and the distortion of full filed range is small
In 1%.
4. a kind of two-dimensional exit pupil according to claim 1 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
The vertical coupled plane of incidence material of vertical waveguide device is optical glass, optical plastic or relief grating.
5. a kind of two-dimensional exit pupil according to claim 1 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
The inclined-plane of vertical extension waveguide assembly and the horizontal extension waveguide assembly is the inclined-plane of parallel tetragonal prism, is coated with different anti-
The media coating wire grating of rate is penetrated, the slant reflection rate is 1%-50%, for the light received to be split into two
Light, a parallel rays to carry out reflection propagation according to reflection law, one is the parallel rays for carrying energy increase and decrease.
6. a kind of two-dimensional exit pupil according to claim 5 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
Inclined-plane spacing between the adjacent bevel surfaces on multiple inclined-planes of vertical extension waveguide assembly is set as 1-8mm.
7. a kind of two-dimensional exit pupil according to claim 1 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
Gap setting between horizontal extension waveguide assembly and two planes being parallel to each other of the vertical extension waveguide assembly is 0-
10mm。
8. a kind of two-dimensional exit pupil according to claim 1 extends the nearly optics of the eye display device of waveguide, which is characterized in that described
The integral thickness of horizontal extension waveguide assembly is 2mm.
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| CN201821400933.XU CN208569194U (en) | 2018-08-29 | 2018-08-29 | A kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide |
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| CN201821400933.XU CN208569194U (en) | 2018-08-29 | 2018-08-29 | A kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983425A (en) * | 2018-08-29 | 2018-12-11 | 深圳珑璟光电技术有限公司 | A kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide |
| CN114415288A (en) * | 2022-01-11 | 2022-04-29 | 北京耐德佳显示技术有限公司 | Waveguide optical module and near-to-eye display equipment |
| CN114779479A (en) * | 2022-06-21 | 2022-07-22 | 北京灵犀微光科技有限公司 | Near-to-eye display device and wearable equipment |
| CN115236788A (en) * | 2022-06-27 | 2022-10-25 | 北京灵犀微光科技有限公司 | Optical waveguide device, near-to-eye display device and smart glasses |
-
2018
- 2018-08-29 CN CN201821400933.XU patent/CN208569194U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983425A (en) * | 2018-08-29 | 2018-12-11 | 深圳珑璟光电技术有限公司 | A kind of nearly optics of the eye display device of two-dimensional exit pupil extension waveguide |
| WO2020042635A1 (en) * | 2018-08-29 | 2020-03-05 | 深圳珑璟光电技术有限公司 | Near-eye optical display device having two-dimensional exit pupil and expansion waveguides |
| CN114415288A (en) * | 2022-01-11 | 2022-04-29 | 北京耐德佳显示技术有限公司 | Waveguide optical module and near-to-eye display equipment |
| CN114779479A (en) * | 2022-06-21 | 2022-07-22 | 北京灵犀微光科技有限公司 | Near-to-eye display device and wearable equipment |
| CN114779479B (en) * | 2022-06-21 | 2022-12-02 | 北京灵犀微光科技有限公司 | Near-to-eye display device and wearable equipment |
| CN115236788A (en) * | 2022-06-27 | 2022-10-25 | 北京灵犀微光科技有限公司 | Optical waveguide device, near-to-eye display device and smart glasses |
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