CN209265075U - Augmented reality optical projection system and wear display equipment - Google Patents
Augmented reality optical projection system and wear display equipment Download PDFInfo
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- CN209265075U CN209265075U CN201920120494.5U CN201920120494U CN209265075U CN 209265075 U CN209265075 U CN 209265075U CN 201920120494 U CN201920120494 U CN 201920120494U CN 209265075 U CN209265075 U CN 209265075U
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Abstract
The utility model discloses a kind of augmented reality optical projection system and display equipment is worn, wherein augmented reality optical projection system includes display module, waveguiding structure and diaphragm, and display module emits the imaging beam for being shown as picture for showing imaging；The imaging beam directive waveguiding structure of waveguiding structure display module transmitting has non-expansion pupil direction and expands pupil direction when imaging beam transmits inside waveguiding structure；Diaphragm is set to display module into the optical path between waveguiding structure, diaphragm is used to limit imaging beam in the non-exit pupil position for expanding pupil direction, diaphragm includes along non-the first opening size for expanding pupil direction, and adjusting the first opening size of setting in non-expansion pupil direction makes exit pupil position visually persist position.The utility model provides a kind of augmented reality optical projection system and wears display equipment, effectively avoids that visual field missing occurs in a dimensional expansion pupil Wave guide system or exit pupil diameter is excessive, guarantees the image quality of total system.
Description
Technical field
The utility model relates to augmented reality field more particularly to a kind of augmented reality optical projection system and wear display
Equipment.
Background technique
Augmented reality (Augmented Reality), abbreviation AR, be a kind of position for calculating video camera camera shooting in real time and
Angle simultaneously adds corresponding image technique, and virtual world is covered in real world and interacted on the screen, originally existing
It is difficult the entity information experienced in the certain time spatial dimension in the real world, by science and technology such as computers, after analog simulation
It is superimposed again, virtual Information application to real world is perceived by human sensory, to reach the sense organ body of exceeding reality
It tests.
It is worn in display equipment in current AR, waveguide type AR system has many advantages, such as compact-sized, and light-weight is AR head
The important development direction for wearing display expands pupil direction and non-expansion pupil direction is corresponding in the wave guide mode group of a dimensional expansion pupil wherein
Emergent pupil is inconsistent, in optical projection system design, easily vignetting occurs according to the design of non-expansion pupil direction, i.e. visual field is dimmed, or even occurs
Visual field missing, eye-observation less than, easily occur that exit pupil diameter is excessive according to the design of pupil direction is expanded, cause total system at image quality
Amount reduces.
Utility model content
Based on this, for the wave guide mode group of a dimensional expansion pupil, easily there is visual field missing according to the design of non-expansion pupil direction, according to expansion
Easily there is the excessive problem of exit pupil diameter in the design of pupil direction, it is necessary to provide a kind of augmented reality optical projection system, can be avoided out
Existing visual field missing or exit pupil diameter are excessive, guarantee the image quality of total system.
To achieve the above object, the utility model proposes augmented reality optical projection system, comprising:
Display module for showing imaging, and emits the imaging beam for being shown as picture；
Waveguiding structure, waveguiding structure described in the imaging beam directive of display module transmitting, the imaging beam
There is non-expansion pupil direction when transmitting inside the waveguiding structure and expand pupil direction；
Diaphragm is set to the display module into the optical path between the waveguiding structure, and the diaphragm is for limiting institute
Imaging beam is stated in the non-exit pupil position for expanding pupil direction, the diaphragm includes the first opening size along non-expansion pupil direction,
Adjusting setting first opening size in non-expansion pupil direction makes exit pupil position visually persist position.
Preferably, the waveguiding structure is D along the length of the imaging beamw, the non-expansion pupil direction, which is imaged, first
Emergent pupil, the emergent pupil of the imaging beam exit facet of waveguiding structure described in first distance of exit pupil is away from for De, the non-expansion pupil
Direction emergent pupil aperture is DA, the non-expansion pupil direction field angle α, then first opening size be
L1=DA+2(Dw+De)×tan(α÷2)。
Preferably, the display module is provided with lens subassembly, the lens subassembly into the light path system of the diaphragm
It is shown for being imaged.
Preferably, the lens subassembly includes the first positive lens set gradually along the imaging beam direction of propagation,
One negative lens, the second positive lens and third positive lens.
Preferably, first positive lens is concave-convex lens, and first negative lens is plano-concave lens, and described second just thoroughly
Mirror and the third positive lens are plano-convex lens, and the crowning of first positive lens is described towards first negative lens
The concave surface of first negative lens towards first positive lens, the crowning of second positive lens and the third positive lens it is convex
The face of rising is oppositely arranged.
Preferably, the refractive index of first positive lens and first negative lens is more than or equal to second positive lens
The Abbe number of refractive index, first positive lens and first negative lens is less than or equal to the Abbe number of second positive lens.
Preferably, the lens subassembly include the second negative lens set gradually along the imaging beam direction of propagation, the 4th just
Lens and the 5th positive lens.
Preferably, second negative lens is plano-concave lens, and the 4th positive lens and the 5th positive lens are plano-convex
Lens, incident direction of the concave face of second negative lens towards the imaging beam, the 4th positive lens and described
The crowning of five positive lens is oppositely arranged.
Preferably, the refractive index of second negative lens and the 5th positive lens is rolled over more than or equal to the 4th positive lens
Penetrate rate, the Abbe number of second negative lens and the 5th positive lens is less than or equal to the Abbe number of the 4th positive lens.
Preferably, each optical element of the lens subassembly is symmetrical arranged in optical axis.
The utility model also provides one kind and wears display equipment, augmented reality optical projection system recited above, including shell,
Wherein the display module, the waveguiding structure and the diaphragm are all set in the shell.
The utility model proposes technical solution in, diaphragm in the adjustable setting of non-the first opening size for expanding pupil direction,
The imaging beam of display module transmitting makes at the non-emergent pupil for expanding pupil direction by diaphragm, and by adjusting the first opening size of setting
In visually persisting position, i.e., observer can be clearly apparent the picture of entire visual field at this time, and the utility model is adjusted non-by diaphragm
Expand the opening size in pupil direction, realize that emergent pupil is imaged on and visually persist position, avoids and visual field missing or emergent pupil imaging occur
Diameter is excessive, and the image quality of total system is effectively ensured.
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
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the non-expansion pupil direction light channel structure schematic diagram of one embodiment of the utility model augmented reality optical projection system；
Fig. 2 is the expansion pupil direction light channel structure schematic diagram of the utility model augmented reality optical projection system in Fig. 1；
Fig. 3 is that the non-part-structure dimension mark for expanding pupil direction optical path of Fig. 1 the utility model augmented reality optical projection system shows
It is intended to；
Fig. 4 is the non-expansion pupil direction light channel structure schematic diagram of the utility model augmented reality optical projection system second embodiment；
Fig. 5 is the expansion pupil direction light channel structure schematic diagram of the utility model augmented reality optical projection system in Fig. 3；
Fig. 6 is the mechanism of diaphragm schematic diagram in Fig. 1 and Fig. 3 the utility model augmented reality optical projection system.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
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 describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and cannot manage
Solution is its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.It is " more in the description of the present invention,
It is a " it is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should do broad sense reason
Solution, for example, " fixation " may be a fixed connection, may be a detachable connection, or integral；It can be mechanical connection, it can also
To be electrical connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary
Or the interaction relationship of two elements, unless otherwise restricted clearly.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
It in addition, the technical solution between each embodiment of the utility model can be combined with each other, but must be with ability
Based on domain those of ordinary skill can be realized, it will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of this technical solution is not present, also not within the protection scope of the requires of the utility model.
Please refer to Fig. 1 and Fig. 6, the utility model proposes augmented reality optical projection system, comprising: display module 100, waveguide
Structure 200 and diaphragm 300.
Display module 100 emits the imaging beam 110 for being shown as picture for showing imaging；
The imaging beam directive waveguiding structure 200 that display module 100 emits, imaging beam 110 is inside waveguiding structure 200
There is non-expansion pupil direction 310 when transmitting and expand pupil direction 320；
Diaphragm 300 is set to display module 100 into the optical path between waveguiding structure 200, and diaphragm 300 is for limiting imaging
For light beam 110 in the non-exit pupil position for expanding pupil direction 310, diaphragm 300 includes the first opening size along non-expansion pupil direction 310,
Non- expansion pupil direction 310, which adjusts the first opening size of setting, makes exit pupil position visually persist position.
Specifically, display module 100 is LCD (Liquid Crystal Display) liquid crystal display or OLED
The self luminous display devices such as (Organic Light-Emitting Diode) Organic Light Emitting Diode, display module 100
It can be LCOS (Liquid Crystal on Silicon) reflection type liquid crystal projection display device, in addition the emergent pupil is light
The diaphragm 300 of system is known as the emergent pupil of system in optical system image space imaging, that is to say, that emergent pupil is the optics
The imaging of system, in addition, diaphragm 300 is expanding pupil direction 320 with the second opening size, since direction waveguiding structure 200 has
Expand pupil effect, therefore, the size of direction diaphragm need to not consider waveguiding structure by direction emergent pupil pore size influences, but when setting
200 are coupled into area size, and the factors such as decoupling area uniformity guarantee in the incident waveguiding structure 200 of imaging beam 110.
The utility model proposes technical solution in, diaphragm 300 is adjustable in non-the first opening size for expanding pupil direction 310
Setting, the imaging beam 110 that display module 100 emits make non-expansion by diaphragm 300, and by adjusting the first opening size of setting
The emergent pupil in pupil direction 310 is in and visually persists position, i.e., observer can be clearly apparent the picture of entire visual field at this time, this is practical new
Type adjusts non-the first opening size for expanding pupil direction 310 by diaphragm 300, realizes that emergent pupil is imaged on and visually persists position, avoids
There is visual field missing or emergent pupil imaging diameter is excessive, is effectively ensured the image quality of total system.
The one dimensional expansion pupil refers in a kind of AR scheme based on waveguide, anti-using grating or array portion in one direction
Microscope group is penetrated to expand emergent pupil.
The pupil direction 320 of expanding is the direction that optical grating diffraction causes exit pupil expansion, and non-expansion pupil direction 310 is not expand pupil mistake
The direction of Cheng Fasheng, general non-expansion pupil direction 310 and expansion pupil direction 320 are mutually perpendicular to.
The position that visually persists is (Eye relief), refer to when observer can be clearly apparent the picture of entire visual field eyeball with
The distance between nearest optical element.
Refering to Fig. 3, waveguiding structure 200 is D along the length of imaging beam 110w, non-expansion pupil direction 310, which is imaged, has first to go out
Pupil 311, emergent pupil of first emergent pupil 311 apart from 200 exit facet of waveguiding structure is away from for De, non-310 emergent pupil aperture of expansion pupil direction is DA,
Non- 310 field angle α of expansion pupil direction, the first opening size be L1 then
L1=DA+2(Dw+De)×tan(α÷2)。
From there through diaphragm 300 is calculated in non-310 first opening size of expansion pupil direction, the first of diaphragm 300 is adjusted
Opening size is the numerical value being calculated, convenient for augmented reality optical projection system using preceding determining that the first opening size, after avoiding
It is continuous to adjust again, reduce optical path set-up procedure.
Display module 100 is provided with lens subassembly 400 into the light path system of diaphragm 300 as a preferred method, thoroughly
Mirror assembly 400 is for being imaged display, for example, being imaged after refraction or scattering process that imaging beam 110 passes through lens subassembly 400
The convergence of light beam 110 is imaged in the optical path after lens subassembly 400.
Fig. 1 and Fig. 2 are please referred to, in one embodiment, lens subassembly 400 includes along 110 direction of propagation of imaging beam
The first positive lens 410, the first negative lens 420, the second positive lens 430 and the third positive lens 440 set gradually, the first positive lens
410 be concave-convex lens, and imaging beam 110 successively passes through above-mentioned first positive lens 410, the first negative lens 420, the second positive lens
430 and third positive lens 440 after guarantee effectively display imaging.
Further, the first negative lens 420 is plano-concave lens, and the second positive lens 430 and third positive lens 440 are plano-convex
Lens, crowning the first negative lens 420 of direction of the first positive lens 410, concave surface the first positive lens of direction of the first negative lens 420
410, the crowning of the second positive lens 430 and the crowning of third positive lens 440 are oppositely arranged, and imaging beam 110 is effectively ensured
Assemble display imaging.
Further, the refractive index of the first positive lens 410 and the first negative lens 420 is more than or equal to the second positive lens 430
The Abbe number of refractive index, the first positive lens 410 and the first negative lens 420 is less than or equal to the Abbe number of the second positive lens 430, it is ensured that
By 110 accurate imaging of imaging beam of lens subassembly 400, at the same by lens subassembly 400 can aberration correction, guarantee imaging
Clearly.The refractive index of general optical element is higher, and dispersion is higher, and Abbe number is lower, and the quality of imaging is better, for example, first just
The refractive index of lens 410 is 1.65, Abbe number 21.51, and 420 refractive index of the first negative lens is 1.65, Abbe number 21.51,
The refractive index of second positive lens 430 is 1.754, Abbe number 55.99.
In addition, depending on the refractive index of third positive lens 440 is according to the design requirement of visual field, 440 refractive index of third positive lens
More than or equal to the second positive lens 430 refractive index or 440 refractive index of third positive lens less than the second positive lens 430 refraction
Rate, for example, the refractive index of third positive lens 440 is 1.55, Abbe number 55.91.
Please refer to Fig. 4 and Fig. 5, in another embodiment, lens subassembly 400 include along 110 direction of propagation of imaging beam according to
The second negative lens 450, the 4th positive lens 460 and the 5th positive lens 470 of secondary setting, imaging beam 110 is successively by above-mentioned the
Guarantee effectively display imaging after two negative lenses 450, the 4th positive lens 460 and the 5th positive lens 470.
Further, the second negative lens 450 is plano-concave lens, and the 4th positive lens 460 and the 5th positive lens 470 are that plano-convex is saturating
Mirror, the incident direction of the concave face of the second negative lens 450 towards imaging beam 110, the 4th positive lens 460 and the 5th positive lens
470 crowning is oppositely arranged, and imaging beam 110 is effectively ensured and assembles display imaging.
Further, the second negative lens 450 is and the refractive index of the 5th positive lens 470 is more than or equal to the 4th positive lens 460
The Abbe number of refractive index, the second negative lens 450 and the 5th positive lens 470 is less than or equal to the Abbe number of the 4th positive lens 460, generally
The refractive index of optical element is higher, and dispersion is higher, and Abbe number is lower, and the quality of imaging is better, for example, the second negative lens 450
Refractive index is 1.92, Abbe number 20.88, and 460 refractive index of the 4th positive lens is 1.69, Abbe number 55.41, the 5th positive lens
470 refractive index is 1.75, Abbe number 52.27.
Each optical element of lens subassembly 400 is symmetrical arranged in optical axis as a preferred method, i.e. lens subassembly
The equidistant position optical property that 400 each optical element is extended outward from its optical axis is identical, and non-expansion pupil direction is effectively ensured
310 and expand pupil direction 320 image quality, the optical property includes refractive index, reflectivity, transmitance, Abbe number, Yi Jiguang
Learn the thickness of element.
Display module 100 is provided with PBS prism group into the optical path between lens subassembly 400 as a preferred method,
500, for example, 500 polarization spectro of PBS prism group increases light penetration when display module 100 is LCOS LC projection display,
Illuminate entire light path system.
The utility model also one kind wears display equipment, including display module 100, waveguiding structure 200 and diaphragm 300, shows
Show module 100 for show be imaged, and transmitting is shown as the imaging beam 110 of picture；The imaging beam that display module 100 emits
There is non-expansion pupil direction 310 to waveguiding structure 200, when imaging beam 110 transmits inside waveguiding structure 200 and expand pupil direction
320；Diaphragm 300 is set to display module 100 into the optical path between waveguiding structure 200, and diaphragm 300 is for limiting imaging beam
110 in the non-exit pupil position for expanding pupil direction 310, and diaphragm 300 includes along non-the first opening size for expanding pupil direction 310, in non-expansion
Pupil direction 310, which adjusts the first opening size of setting, makes exit pupil position persist position visual, and the display equipment of wearing further includes
Shell (not shown), wherein display module 100, waveguiding structure 200 and diaphragm 300 are all set in shell.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Under the utility model design of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (11)
1. a kind of augmented reality optical projection system characterized by comprising
Display module for showing imaging, and emits the imaging beam for being shown as picture；
Waveguiding structure, waveguiding structure described in the imaging beam directive of display module transmitting, the imaging beam is in institute
There is non-expansion pupil direction when stating transmitting inside waveguiding structure and expand pupil direction；
Diaphragm is set to the display module into the optical path between the waveguiding structure, the diaphragm for limit it is described at
As light beam it is described it is non-expand pupil direction exit pupil position, the diaphragm include along it is non-expand pupil direction the first opening size, non-
Expanding pupil direction adjusting setting first opening size makes exit pupil position visually persist position.
2. augmented reality optical projection system as described in claim 1, which is characterized in that the waveguiding structure is along the imaging beam
Length be Dw, the non-expansion pupil direction imaging has the first emergent pupil, waveguiding structure described in first distance of exit pupil it is described at
As the emergent pupil of beam exit face is away from for De, the non-expansion pupil direction emergent pupil aperture is DA, the non-expansion pupil direction field angle α is described
First opening size be L1 then
L1=DA+2(Dw+De)×tan(α÷2)。
3. augmented reality optical projection system as claimed in claim 1 or 2, which is characterized in that the display module to the diaphragm
Light path system in be provided with lens subassembly, the lens subassembly is for being imaged display.
4. augmented reality optical projection system as claimed in claim 3, which is characterized in that the lens subassembly includes along the imaging
The first positive lens, the first negative lens, the second positive lens and the third positive lens that direction of beam propagation is set gradually.
5. augmented reality optical projection system as claimed in claim 4, which is characterized in that first positive lens is concave-convex lens,
First negative lens is plano-concave lens, and second positive lens and the third positive lens are plano-convex lens, described first
For the crowning of positive lens towards first negative lens, the concave surface of first negative lens is described towards first positive lens
The crowning of the crowning of second positive lens and the third positive lens is oppositely arranged.
6. augmented reality optical projection system as claimed in claim 4, which is characterized in that first positive lens and described first negative
The refractive index of lens is more than or equal to the refractive index of second positive lens, first positive lens and first negative lens Ah
Shellfish number is less than or equal to the Abbe number of second positive lens.
7. augmented reality optical projection system as claimed in claim 3, which is characterized in that the lens subassembly includes along imaging beam
The second negative lens, the 4th positive lens and the 5th positive lens that the direction of propagation is set gradually.
8. augmented reality optical projection system as claimed in claim 7, which is characterized in that second negative lens is plano-concave lens,
4th positive lens and the 5th positive lens are plano-convex lens, and the concave face of second negative lens is towards the imaging
The crowning of the incident direction of beam, the 4th positive lens and the 5th positive lens is oppositely arranged.
9. augmented reality optical projection system as claimed in claim 8, which is characterized in that second negative lens and the described 5th is just
The refractive index of lens is more than or equal to the 4th positive lens refractive index, the Abbe of second negative lens and the 5th positive lens
Number is less than or equal to the Abbe number of the 4th positive lens.
10. augmented reality optical projection system as claimed in claim 3, which is characterized in that each optics member of the lens subassembly
Part is symmetrical arranged in optical axis.
11. one kind wears display equipment, including augmented reality optical projection system described in claim 1, which is characterized in that including outer
Shell, wherein the display module, the waveguiding structure and the diaphragm are all set in the shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920120494.5U CN209265075U (en) | 2019-01-23 | 2019-01-23 | Augmented reality optical projection system and wear display equipment |
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| CN201920120494.5U CN209265075U (en) | 2019-01-23 | 2019-01-23 | Augmented reality optical projection system and wear display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541803A (en) * | 2019-01-23 | 2019-03-29 | 歌尔股份有限公司 | Augmented reality optical projection system and wear display equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541803A (en) * | 2019-01-23 | 2019-03-29 | 歌尔股份有限公司 | Augmented reality optical projection system and wear display equipment |
| CN109541803B (en) * | 2019-01-23 | 2023-08-29 | 歌尔光学科技有限公司 | Augmented reality projection system and head-mounted display device |
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Effective date of registration: 20221129 Address after: 261031 workshop 1, phase III, Geer Photoelectric Industrial Park, 3999 Huixian Road, Yongchun community, Qingchi street, high tech Zone, Weifang City, Shandong Province Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 261031 No. 268 Dongfang Road, hi tech Industrial Development Zone, Shandong, Weifang Patentee before: GOERTEK Inc. |
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