CN110231714A - A method of enhancing AR glasses optical waveguide light intensity uniformity - Google Patents
A method of enhancing AR glasses optical waveguide light intensity uniformity Download PDFInfo
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- CN110231714A CN110231714A CN201910520564.0A CN201910520564A CN110231714A CN 110231714 A CN110231714 A CN 110231714A CN 201910520564 A CN201910520564 A CN 201910520564A CN 110231714 A CN110231714 A CN 110231714A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 37
- 239000011521 glass Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 230000001795 light effect Effects 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/124—Geodesic lenses or integrated gratings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The present invention relates to a kind of methods for enhancing AR glasses optical waveguide light intensity uniformity.First reflection area of this method after light leaves the grating region couple-in is for incident angle range (light (no second energy loss) one special grating with light splitting function of production of b to c).The special grating is that (light of b to c) has some diffracted light effect to incident angle range, to reduce incident angle range (reflected energy of the light of b to c) in optical waveguide substrate, reaching its energy, (the consistent level of the light of a to b) enhances AR glasses optical waveguide light intensity uniformity with this with angular range.The present invention uses special grating, has some diffracted light effect to the light of incident angle range, to control the light intensity of this some light, enhances optical waveguide light intensity uniformity.The method of the present invention have many advantages, such as it is simple, conveniently, stablize.
Description
Technical field
The present invention relates to the fields augmented reality (AR), and in particular to a kind of enhancing AR glasses optical waveguide light intensity uniformity
Method.
Background technique
AR is a kind of real combination and the technology that virtual image, video, 3D model are applied, and the target of this technology is to shield
Virtual world is covered in real world and interacted on curtain.The companies such as existing Google, Microsoft release commercialized AR at present
Mirror has led the development and application of AR technology.
AR glasses based on optical waveguide are one of the AR glasses of current most large-scale application prospect.Due to optical waveguide structure
Small, light weight, optical function are powerful, are the core devices for realizing lightweight AR glasses.Currently based on grating (such as couple-in
Grating, couple-out grating, folding grating etc.) optical waveguide be AR glasses optical waveguide mainstream selection.However existing AR
Glasses optical waveguide haves the shortcomings that uniformity is poor.Therefore, invention enhancing AR glasses optical waveguide light intensity uniformity method for
Optical waveguide AR eyewear applications are of great significance.
Summary of the invention
For above-mentioned defect existing in the prior art, the invention proposes a kind of enhancing AR glasses optical waveguide uniform intensities
The method of property.
The principle of the present invention and technical solution are as follows:
Functionally, the structure of the optical waveguide of most basic AR glasses include optical waveguide substrate, couple-in grating,
Couple-out grating etc.；The light come out from miniature display screen enters couple-in grating by optical system, secondly passes through
Optical waveguide substrate total reflection conduction, exports using couple-out grating, injects human eye and forms imaging.Lead to AR glasses light wave
Leading a poor main cause of light intensity uniformity is, the light of incidence angles degree is because in the reflection time of the grating region couple-in
Number is different to cause intensity loss different.
The incident angle and incident area for injecting the light of couple-in grating, therefore can be true at one-to-one relationship
(there are secondary reflections in the grating region couple-in for the light of a to b), thus corresponding light ray energy for fixed a certain incident angle range
Lose larger, and (light of b to c) is due to being not present secondary counter in the grating region couple-in for another incident angle range
It penetrates, therefore is lost without second energy.
The method for solving the problems, such as this is that the first reflection area after light leaves the grating region couple-in is for incidence
(light (no second energy loss) production one of b to c) has the special grating of light splitting function to angular range.Described is special
Grating is that (light of b to c) has some diffracted light effect, to reduce incident angle range (b to c) to incident angle range
Reflected energy of the light in optical waveguide substrate, reach its energy and angular range (the consistent level of the light of a to b), with
This enhancing AR glasses optical waveguide light intensity uniformity.
The step of realizing enhancing AR glasses optical waveguide light intensity uniformity method includes: 1, is obtained by detection or theoretical calculation
(there are secondary reflection, a certain incident angle ranges in the grating region couple-in for the light of a to b) for a certain incident angle range out
(secondary reflection is not present in the grating region couple-in in the light of b to c), and obtains because of secondary reflection bring intensity loss ratio
Example loss.2, (light of b to c) leave first time substrate behind the grating region couple-in for calculating or measurement incident angle range
Reflecting region (AB)；3, special grating is made at the region of optical waveguide substrate (AB), the special grating is to incident angle
(light of b to c) has some diffracted light effect and guarantees intensity loss ratio loss range.It can increase after above step
Strong AR glasses optical waveguide light intensity uniformity.
The invention proposes a kind of methods for enhancing AR glasses optical waveguide light intensity uniformity, using special grating, to incidence
The light of angular range has some diffracted light effect, to control the light intensity of this some light, enhancing optical waveguide light intensity is equal
Even property.The method of the present invention have many advantages, such as it is simple, conveniently, stablize.
Detailed description of the invention
Fig. 1 is AR glasses optical waveguide structure used in the present invention and light path schematic diagram.
Specific embodiment
As shown in Figure 1, device used in the present invention includes: couple-in grating 1, that is, it is coupled into grating, optical waveguide substrate
2, special grating 3, couple-out grating 4, i.e. decoupling grating.
Specific implementation enhancing AR glasses optical waveguide light intensity uniformity method the following steps are included:
1, obtain the light of a certain incident angle range (a=1.92 to b=1.57) in couple- by detection or theoretical calculation
The grating region in is radian there are secondary reflection, the unit of angle, and both 180 degree corresponded to π；A certain incident angle range (b=1.57 to c
=1.40) secondary reflection is not present in the grating region couple-in in light, and obtains because of secondary reflection bring intensity loss ratio
Example loss=0.1.
2, after the light of calculating or measurement incident angle range (b=1.57 to c=1.40) leaves the grating region couple-in
First time substrate reflecting region (AB).
3, special grating is made at the region of optical waveguide substrate (AB), the special grating is to incident angle range (b
=1.57 to c=1.40) light there is some diffracted light effect and intensity loss ratio is made to be about loss=0.1.More than
AR glasses optical waveguide light intensity uniformity can be enhanced after step.
Above is only a specific embodiment of the present invention, but technical characteristic of the invention is not limited thereto, Ren Heben
Within the field of the present invention, made changes or modifications all cover within the scope of the patent of the present invention the technical staff in field.
Claims (1)
1. a kind of method for enhancing AR glasses optical waveguide light intensity uniformity, including optical waveguide substrate, it is coupled into grating, decoupling grating；
The light come out from miniature display screen enters by optical system is coupled into grating grating, secondly passes by optical waveguide substrate total reflection
It leads, is exported using decoupling grating, inject human eye and form imaging, it is characterised in that:
Step 1, by detecting or being calculated a certain incident angle a, to the light of b range, being coupled into grating region, there are secondary
Reflection, there is no secondary reflections being coupled into grating region for the light of a certain incident angle b to c range, and obtain because of secondary reflection band
The intensity loss ratio loss come；
Step 2, calculate or measurement incident angle b to c range light leave be coupled into grating region after first time substrate echo area
Domain AB；
Step 3 makes special grating on the region AB of optical waveguide substrate, and the special grating is to incident angle b to c model
The light enclosed has some diffracted light effect and guarantees that intensity loss ratio is loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520564.0A CN110231714B (en) | 2019-06-17 | 2019-06-17 | Method for enhancing light intensity uniformity of optical waveguide of AR glasses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910520564.0A CN110231714B (en) | 2019-06-17 | 2019-06-17 | Method for enhancing light intensity uniformity of optical waveguide of AR glasses |
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| Publication Number | Publication Date |
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| CN110231714A true CN110231714A (en) | 2019-09-13 |
| CN110231714B CN110231714B (en) | 2021-01-29 |
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| CN201910520564.0A Active CN110231714B (en) | 2019-06-17 | 2019-06-17 | Method for enhancing light intensity uniformity of optical waveguide of AR glasses |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021094706A1 (en) * | 2019-11-11 | 2021-05-20 | Wave Optics Ltd | Led illuminated waveguide projector display |
| TWI804005B (en) * | 2020-10-14 | 2023-06-01 | 芬蘭商迪斯派利克斯公司 | Lightguide of eyewear apparatus, eyewear apparatus and operational and manufacturing method of lightguide |
| JP7405469B2 (en) | 2019-12-09 | 2023-12-26 | エガロン，クラウディオ，オリヴェイラ | System and method for side illumination of waveguides |
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| TWI804005B (en) * | 2020-10-14 | 2023-06-01 | 芬蘭商迪斯派利克斯公司 | Lightguide of eyewear apparatus, eyewear apparatus and operational and manufacturing method of lightguide |
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| Publication number | Publication date |
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| CN110231714B (en) | 2021-01-29 |
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Denomination of invention: A method to enhance the uniformity of optical waveguide intensity in AR glasses Effective date of registration: 20231205 Granted publication date: 20210129 Pledgee: Zhejiang Mintai Commercial Bank Co.,Ltd. Hangzhou Yuhang Branch Pledgor: HANGZHOU GUANGLI TECHNOLOGY Co.,Ltd. Registration number: Y2023980069412 |