CN113219662A - AR glasses optical system and using method thereof - Google Patents
AR glasses optical system and using method thereof Download PDFInfo
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- CN113219662A CN113219662A CN202110461956.1A CN202110461956A CN113219662A CN 113219662 A CN113219662 A CN 113219662A CN 202110461956 A CN202110461956 A CN 202110461956A CN 113219662 A CN113219662 A CN 113219662A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 26
- 239000011521 glass Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000011229 interlayer Substances 0.000 claims abstract description 12
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 13
- 238000002834 transmittance Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 210000001747 pupil Anatomy 0.000 abstract description 3
- 238000003384 imaging method Methods 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
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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
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- Optics & Photonics (AREA)
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Abstract
The invention provides an AR glasses optical system and a using method thereof, wherein the AR glasses optical system comprises: the display screen comprises a first free-form surface reflector, a second free-form surface reflector, a display screen and an air interlayer; the display screen is fixed through the screen bracket; the first free-form surface reflector and the second free-form surface reflector are fixed in a gluing mode; the air interlayer is a triangular area formed by the display screen, the first free-form surface reflector and the second free-form surface reflector. The invention solves the problems of small exit pupil distance and small FOV of the AR glasses by adopting a double free-form surface design structure.
Description
Technical Field
The invention relates to the technical field of AR (augmented reality) glasses, in particular to an AR glasses optical system and a using method thereof.
Background
Patent document CN207457609U (application number: CN201721496580.3) discloses a near-eye display optical module for AR eyeglasses and AR eyeglasses, the optical module including: the imaging lens is arranged on one side of human eyes facing to the direction of watching the AR content, and the micro display screen and the reflective optical element are arranged on the other side of the human eyes; the optical image generated by the micro display screen is reflected to the imaging lens through the reflection optical element, and the optical image is magnified and imaged through the imaging lens.
Common AR glasses optical systems on the market are designed based on the compact requirement of a small visual field, the visual field does not exceed 50 degrees, the exit pupil distance is generally less than 25mm, and the requirements of users cannot be met on occasions needing immersion.
Disclosure of Invention
In view of the shortcomings in the prior art, it is an object of the present invention to provide an AR glasses optical system and a method of using the same.
According to the present invention, there is provided an AR eyeglass optical system comprising: the display screen, the first free-form surface reflector, the second free-form surface reflector and the air interlayer are arranged on the display screen;
the display screen is fixed through the screen bracket;
the first free-form surface reflector and the second free-form surface reflector are fixed in a gluing mode;
the air interlayer is a triangular area formed by the display screen, the first free-form surface reflector and the second free-form surface reflector.
Preferably, after light rays emitted from the display screen pass through the air interlayer and reach the first free-form surface reflector, a part of light rays are refracted out, and the other part of light rays reach the second free-form surface reflector through reflection;
the light rays reaching the second free-form surface reflecting mirror piece are reflected into human eyes by means of partial refraction and partial reflection, so that the user can observe the content on the display screen.
Preferably, the included angle between the screen and the first free-form surface reflecting lens is 28-40 degrees.
Preferably, the included angle between the first free-form surface reflector and the second free-form surface reflector is less than 55 degrees.
Preferably, the included angle between the second free-form surface reflector and the horizontal sight line of human eyes is 65-78 degrees.
Preferably, the surfaces of the first free-form surface reflector and the second free-form surface reflector are both provided with dynamic light shielding layers, the dynamic light shielding layers are formed by single pixels or pixel arrays, and each pixel independently controls the transmittance through an electric signal.
Preferably, the first free-form surface mirror plate and the second free-form surface mirror plate are made of the same material and are any one of a resin lens, a progressive addition lens, a PC sheet, a glass lens and a PVC lens.
The AR glasses using method provided by the invention comprises the following steps:
step 1: adjusting the angles of the first free-form surface reflector and the second free-form surface reflector so that light rays from the display screen pass through the first free-form surface reflector and the second free-form surface reflector and finally are reflected to enter human eyes;
step 2: the transmittance of the first free-form surface reflector and the transmittance of the second free-form surface reflector are adjusted, so that the light entering human eyes meets the comfort level of human bodies.
Preferably, when the included angle between the screen and the first free-form surface reflecting lens is 35 degrees, the included angle between the first free-form surface reflecting lens and the second free-form surface reflecting lens is 45 degrees, and the included angle between the second free-form surface reflecting lens and the horizontal sight line of human eyes is 70 degrees, the light from the display screen, which is converged to human eyes, is the most.
Preferably, a dynamic light shielding layer is mounted on the surface of each of the first and second free-form surface mirrors, and the dynamic light shielding layer is formed by a single pixel or a pixel array, wherein each pixel has its transmittance controlled by an electrical signal.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention solves the problems of small exit pupil distance and small FOV of the AR glasses by adopting a double free-form surface design structure;
(2) according to the invention, through the design of the dynamic shading layer, when the AR glasses are used in the outside, the transmittance can be adjusted according to the intensity of sunlight, so that the visual perception of a user is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an optical design of AR glasses;
FIG. 2 is a calculated dot-sequence diagram;
FIG. 3 is a computed distortion grid map.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1:
as shown in fig. 1, an AR glasses optical system provided according to the present invention includes: the device comprises a first free-form surface reflector 1, a second free-form surface reflector 2, a display screen 3 and an air interlayer 4; the display screen 3 is fixed through a screen bracket; the first free-form surface reflector 1 and the second free-form surface reflector 2 are fixed in a gluing mode; the user viewing position is at the intersection of the sets of rays.
The working principle is as follows:
after the light emitted from the display screen 3 reaches the first free-form surface reflector 1, part of the light is refracted out, and the other part of the light reaches the second free-form surface reflector 2 through reflection; the light rays reaching the second free-form surface reflector 2 are reflected into human eyes from the display screen 3 in a way of being partially refracted and partially reflected; in this way the user can observe the content on the display screen 3;
the included angle between the screen and the first free-form surface reflector 1 is 28-40 degrees;
the included angle between the first free-form surface reflector 1 and the second free-form surface reflector 2 is less than 55 degrees;
the included angle between the second free-form surface reflector 2 and the horizontal sight line of human eyes is 65-78 degrees.
As with fig. 2, the distortion and speckle characteristic case for one example, the sharpness of the image can be illustrated for large field angles.
Referring to fig. 3, the optical system is positioned in front of the human eye, the large field of view can reach 80 degrees FOV, and the first lens has two functions, namely refraction and reflection, and half-transmission and half-reflection. The angle between the first lens and the vertical ground direction is more than 20 degrees and less than 50 degrees. The included angle between the two lenses is less than 55 degrees.
Example 2:
example 2 is a preferred example of example 1.
According to the present invention, there is provided an AR eyeglass optical system comprising: the device comprises a first free-form surface reflector 1, a second free-form surface reflector 2, a display screen 3 and an air interlayer 4; the display screen 3 is fixed through a screen bracket; the first free-form surface reflector 1 and the second free-form surface reflector 2 are fixed in a gluing mode; the air interlayer 4 is a triangular area formed by the display screen 3, the first free-form surface reflector 1 and the second free-form surface reflector 2. After light rays emitted from the display screen 3 pass through the air interlayer 4 and reach the first free-form surface reflector 1, part of the light rays are refracted out, and the other part of the light rays reach the second free-form surface reflector 2 through reflection; the light reaching the second free-form surface mirror 2 is reflected by a part of the light reflected by the display screen 3 into human eyes, so that the user can observe the content on the display screen 3. The included angle between the screen and the first free-form surface reflector 1 is 28-40 degrees. The included angle between the first free-form surface reflector 1 and the second free-form surface reflector 2 is less than 55 degrees. The included angle between the second free-form surface reflector 2 and the horizontal sight line of human eyes is 65-78 degrees. Dynamic shading layers are arranged on the surfaces of the first free-form surface reflector 1 and the second free-form surface reflector 2, each dynamic shading layer is composed of a single pixel or a pixel array, and the transmittance of each pixel is independently controlled through an electric signal. The first free-form surface reflector 1 and the second free-form surface reflector 2 are made of the same material and are any one of resin lenses, progressive multi-focus lenses, PC (personal computer) sheets, glass lenses and PVC (polyvinyl chloride) lenses.
The AR glasses using method provided by the invention comprises the following steps: step 1: adjusting the angles of the first free-form surface reflector 1 and the second free-form surface reflector 2, so that light rays from the display screen 3 pass through the first free-form surface reflector 1 and the second free-form surface reflector 2 and finally are reflected to enter human eyes; step 2: the transmittance of the first free-form surface reflector 1 and the transmittance of the second free-form surface reflector 2 are adjusted, so that the light entering human eyes meets the comfort level of human bodies. When the included angle between the screen and the first free-form surface reflection lens 1 is 35 degrees, the included angle between the first free-form surface reflection lens 1 and the second free-form surface reflection lens 2 is 45 degrees, and the included angle between the second free-form surface reflection lens 2 and the horizontal sight line of human eyes is 70 degrees, the light from the display screen 3, which is converged to the human eyes, is the most. And dynamic light shielding layers are arranged on the surfaces of the first free-form surface reflector 1 and the second free-form surface reflector 2, each dynamic light shielding layer is composed of a single pixel or a pixel array, and the transmittance of each pixel is independently controlled through an electric signal.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. An AR glasses optical system, comprising: the display screen comprises a first free-form surface reflector (1), a second free-form surface reflector (2), a display screen (3) and an air interlayer (4);
the display screen (3) is fixed through a screen bracket;
the first free-form surface reflector (1) and the second free-form surface reflector (2) are fixed in a gluing mode;
the air interlayer (4) is a triangular area formed by the display screen (3), the first free-form surface reflector (1) and the second free-form surface reflector (2).
2. The AR spectacle optical system according to claim 1, wherein after the light emitted from the display screen (3) passes through the air interlayer (4) and reaches the first free-form surface mirror (1), a part of the light is refracted and another part of the light reaches the second free-form surface mirror (2) by reflection;
the light reaching the second free-form surface reflector (2) is reflected from the display screen (3) into human eyes by means of partial refraction and partial reflection.
3. The AR glasses optical system according to claim 1, characterized in that the screen is at an angle of 28 to 40 degrees with the first free-form surface mirror (1).
4. The AR spectacle optical system according to claim 1, wherein the first free-form surface mirror (1) and the second free-form surface mirror (2) form an angle of less than 55 degrees.
5. The AR spectacle optical system according to claim 1, wherein the second free-form surface reflecting lens (2) forms an angle of 65 to 78 degrees with the horizontal line of sight of the human eye.
6. The AR spectacle optical system according to claim 1, wherein the first free-form surface mirror (1) and the second free-form surface mirror (2) are each provided with a dynamic light shielding layer, the dynamic light shielding layer being constituted by a single pixel or a pixel array, each pixel having its transmittance controlled individually by an electric signal.
7. The AR spectacle optical system according to claim 1, wherein the first free-form surface mirror (1) and the second free-form surface mirror (2) are made of the same material, and include any one of a resin mirror, a progressive addition mirror, a PC sheet, a glass mirror, and a PVC mirror.
8. A method for using AR glasses, using the AR glasses optical system of claim 1, comprising the steps of:
step 1: adjusting the angles of the first free-form surface reflector (1) and the second free-form surface reflector (2) to enable light rays from the display screen (3) to pass through the first free-form surface reflector (1) and the second free-form surface reflector (2) and finally to be reflected into human eyes;
step 2: the transmittance of the first free-form surface reflector (1) and the second free-form surface reflector (2) is adjusted.
9. The method for using the AR glasses according to claim 8, wherein when the screen is at an angle of 35 degrees with respect to the first free-form surface reflector (1), the first free-form surface reflector (1) is at an angle of 45 degrees with respect to the second free-form surface reflector (2), and the second free-form surface reflector (2) is at an angle of 70 degrees with respect to the horizontal line of sight of the human eye, the most light from the display screen (3) is converged to the human eye.
10. The method for using AR glasses according to claim 8, wherein a dynamic light shielding layer is installed on the surface of each of the first and second free-form surface reflection lenses (1, 2), and the dynamic light shielding layer is composed of a single pixel or a pixel array, and each pixel individually controls transmittance by an electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110461956.1A CN113219662A (en) | 2021-04-27 | 2021-04-27 | AR glasses optical system and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110461956.1A CN113219662A (en) | 2021-04-27 | 2021-04-27 | AR glasses optical system and using method thereof |
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| Publication Number | Publication Date |
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| CN113219662A true CN113219662A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110461956.1A Pending CN113219662A (en) | 2021-04-27 | 2021-04-27 | AR glasses optical system and using method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300777A (en) * | 2017-08-18 | 2017-10-27 | 深圳惠牛科技有限公司 | A kind of imaging system reflected based on double free form surfaces |
| CN109782441A (en) * | 2017-11-14 | 2019-05-21 | 塔普翊海（上海）智能科技有限公司 | A kind of aobvious optical system of the see-through head of nearly eye |
| CN110073272A (en) * | 2016-12-08 | 2019-07-30 | 北京耐德佳显示技术有限公司 | A kind of free curved surface prism group and the nearly eye display device using it |
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2021
- 2021-04-27 CN CN202110461956.1A patent/CN113219662A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110073272A (en) * | 2016-12-08 | 2019-07-30 | 北京耐德佳显示技术有限公司 | A kind of free curved surface prism group and the nearly eye display device using it |
| CN107300777A (en) * | 2017-08-18 | 2017-10-27 | 深圳惠牛科技有限公司 | A kind of imaging system reflected based on double free form surfaces |
| CN109782441A (en) * | 2017-11-14 | 2019-05-21 | 塔普翊海（上海）智能科技有限公司 | A kind of aobvious optical system of the see-through head of nearly eye |
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Application publication date: 20210806 |