CN113204116B - AR (augmented reality) glasses lens with reflector - Google Patents
AR (augmented reality) glasses lens with reflector Download PDFInfo
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- CN113204116B CN113204116B CN202110433262.7A CN202110433262A CN113204116B CN 113204116 B CN113204116 B CN 113204116B CN 202110433262 A CN202110433262 A CN 202110433262A CN 113204116 B CN113204116 B CN 113204116B
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- 230000003190 augmentative effect Effects 0.000 title claims abstract description 6
- 239000011521 glass Substances 0.000 title claims description 22
- 206010020675 Hypermetropia Diseases 0.000 claims description 3
- 208000001491 myopia Diseases 0.000 claims description 3
- 206010049565 Muscle fatigue Diseases 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 210000001747 pupil Anatomy 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
-
- 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
- G02B2027/0178—Eyeglass type
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention provides an AR (augmented reality) spectacle lens with a reflector, which comprises a spectacle lens body, a display screen arranged at the top of the spectacle lens body, a first lens group arranged above the spectacle lens body and the reflector fixed with the spectacle lens body, wherein the reflector is positioned below the spectacle lens body, the inner surface of the reflector is a refraction surface, and the outer surface of the reflector is plated with a reflecting film; the image output by the display screen generates incident light through the first lens group, the incident light enters the inner surface of the reflector, the small-angle incident light is refracted at the refraction surface at a large angle, the refracted light is reflected by the reflection film on the outer surface, and the reflected light is refracted by the refraction surface and then is emitted. According to the invention, when looking downwards, human eyes can just see the image output by the AR display screen, the visual habit of the human eyes is met, the sight in the right front is not blocked, and muscle fatigue of the human eyes is not easy to cause.
Description
Technical Field
The invention relates to the technology of AR (augmented reality) glasses, in particular to an AR glasses lens with a reflector.
Background
In AR glasses in the market at present, when people look at images output by an AR display screen through lenses, the people look straight ahead or look up to see the images. The visual angle mode has certain defects, firstly, when an image output by the AR display screen is in the direct-vision front of a person, the sight line of the front of a user can be seriously influenced, secondly, the visual habit analysis of the person is carried out, when the person visually observes the front or looks upwards, the person is watching a distant object, at the moment, the focal length of eyes of the person is a long focal length, and when the person watches a near object, under most conditions, the eyes of the person downwards watch, such as a mobile phone, a book and the like.
However, when analyzing the optical system of the image output by the display screen of the AR glasses, it is found that the optical system of the image output by the display screen of the AR glasses cannot image the display screen at a place far away from the person, and this image is generally within one to two meters, and in most cases within one meter.
By integrating the above analysis, it is necessary to design an optical system of AR glasses, so that the eyes can see the image output by the AR display screen when looking down, and the image can better conform to the vision habit of the eyes, so that the eyes can not block the sight in front, and the muscles of the eyes are less prone to fatigue.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an AR (augmented reality) spectacle lens with a reflector, which accords with the visual habit of human eyes, cannot shield the sight right in front and cannot cause muscle fatigue of the human eyes easily.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
an AR (augmented reality) spectacle lens with a reflector comprises a spectacle lens body, a display screen arranged at the top of the spectacle lens body, a first lens group arranged above the spectacle lens body and the reflector fixed with the spectacle lens body, wherein the reflector is positioned below the spectacle lens body, the inner surface of the reflector is a refraction surface, and the outer surface of the reflector is plated with a reflecting film; the image output by the display screen generates incident light through the first lens group, the incident light enters the inner surface of the reflector, the small-angle incident light is refracted at the refraction surface at a large angle, the refracted light is reflected by the reflection film on the outer surface, and the reflected light is refracted by the refraction surface and then is emitted. An AR spectacle lens with a reflector has the advantages of low processing and production cost, low manufacturing cost, easy large-scale production and the like.
Preferably, the reflector is of a stepped structure, the number of steps is more than or equal to 1, and the outer surface of the reflector and the outer surface of the spectacle lens body can belong to the same curved surface.
Preferably, the stepped structure of the reflector is adhesively fixed.
Preferably, an included angle A between the emergent light rays refracted and reflected by the reflector and the horizontal direction is fixed, and the degree range of the included angle is more than 40 degrees and more than 20 degrees.
Preferably, the display screen is a monochrome or multi-color display screen, and the output image is a monochrome image or a multi-color image.
Preferably, the reflecting film is a reflecting film or a semi-reflecting and semi-transmitting film for a single-color display screen, or a visible light full-bandwidth reflecting film or a semi-reflecting and semi-transmitting film for a multicolor display screen.
Preferably, the first lens group and the spectacle lens body may be of an integral structure or bonded.
Preferably, the spectacle lens body can be customized to be a near-sighted lens or a far-sighted lens or sunglasses or plano glasses according to the curvature of the eyes of the user.
Preferably, the reflecting surface of the reflector is provided with an inclined surface extending outwards, the oblique angle of the inclined surface is parallel to the refraction angle of incident light entering the glasses lens body, and the extension amount of the inclined surface is conjugated with the size of the display screen.
Preferably, the first lens group may be designed as a converging positive lens or a diverging negative lens according to diopter difference of human eyes.
The invention has the beneficial effects that: the image that the AR display screen output just in time can be seen to people's eye when looking down, accords with people's eye's vision habit, can not shelter from the sight in the dead ahead, is difficult to arouse people's muscle fatigue.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an AR eyeglass lens with a reflector according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of large angle refraction at small angle incidence of an incident ray;
FIG. 3 is a schematic diagram of a reflective surface reflecting screen light;
FIG. 4 is a schematic view of an extended line of refracted rays;
FIG. 5 is a schematic view of reflected light rays entering a human eye;
FIG. 6 is a schematic structural diagram of a second embodiment of an AR eyeglass lens with a reflector according to the present invention;
fig. 7 is a schematic diagram of the ray path.
In the figure, 1 is an eyeglass lens body, 2 is a display screen, 3 is a first lens group, 4 is a reflector, 401 is a refractive surface, 402 is a reflecting film, and 403 is an inclined surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Other embodiments, which can be obtained by persons skilled in the art without any inventive work based on the embodiments in the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention 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 invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1, the present invention provides an AR spectacle lens with a reflector 4, which includes a spectacle lens body 1, a display screen 2 disposed on the top of the spectacle lens body 1, a first lens group 3 disposed above the spectacle lens body 1, and a reflector 4 fixed to the spectacle lens body 1, wherein the reflector 4 is disposed below the spectacle lens body 1, the inner surface of the reflector 4 is a refraction surface 401, the outer surface is a reflection surface, and the reflection surface is coated with a reflection film 402; an image output by the display screen 2 generates incident light through the first lens group 3, the incident light enters the inner surface of the reflector 4, the small-angle incident light is refracted at a large angle on the refraction surface 401, the refracted light is reflected on the reflection film 402 on the outer surface, and the reflected light is refracted by the refraction surface 401 and then exits.
Preferably, the reflector 4 is of a stepped structure, the number of steps is more than or equal to 1, and the outer surface of the reflector 4 and the outer surface of the spectacle lens body 1 belong to the same curved surface. The stepped structure of the reflector 4 may be glued, in particular by glue.
As shown in fig. 2, the present invention utilizes the principle of large angle refraction when the incident light is incident at a small angle, air is above the medium surface, and the optical lens material is below the medium surface, in this embodiment, PMMA is selected, the refractive index is 1.4918, and according to the principle of optical refraction, 1 × sin (90-M) =1.4918 × sin (90-N), the value of the angle N-M is closer to N as the value of the incident angle M of the incident light is smaller, and when M =0, sin (90-N) =1/1.4918, 90-N is closer to 42 degrees, and N is closer to 48 degrees. This optical basic feature greatly contributes to the implementation of the present embodiment.
As shown in fig. 3, the larger the value of N-M, the smaller the angle W between the reflective surface and the surface of the spectacle lens, which means that the larger the area of the reflective surface that can be generated in a spectacle lens of a certain basic thickness, the more information can be reflected on the display screen 2 by a single step reflective surface, and the smaller the number of steps of the step reflective surface in the present invention.
As shown in fig. 4, the light emitted from the geometric center C of the display screen 2 is refracted and reflected by the glasses lens, and the extended lines of the refracted light by the glasses lens meet at point D. The stepped reflection surface is used for reflecting the incident light refracted by the spectacle lens, and the extension line of the incident light intersects point D, which means that for the reflection surface, the light to be reflected comes from virtual intersection point D, and for the human eye to see the image of the display screen 2 clearly, the emergent light (light entering the human eye) of the light reflected by the reflection surface refracted again by the spectacle lens needs to be parallel light entering the pupil of the human eye. Since the thickness of the spectacle lens is relatively small compared with the order of magnitude of curvature of the curved surface of the spectacle lens, and the optical path of the light reflected by the reflecting surface in the spectacle lens is short, the light reflected by the reflecting surface is also defined as parallel light in the embodiment of the present invention (in the actual design, the light reflected by the reflecting surface may also be defined as converging light intersecting at a certain point at a distance). The condition that the light rays emitted from the point D and reflected by the reflecting surface are parallel light rays (converging light rays intersecting at a certain point far away) means that the reflecting surface is a paraboloid (ellipsoid) with the point D as a focus.
Because each step reflection surface can only receive part of the information of the display screen 2, in order to completely display the information of the display screen 2, it is necessary to provide a plurality of step reflection surfaces, the first step reflection surface receives the information of the first step reflection area sent by the display screen 2, the second step reflection surface receives the information of the second step reflection area sent by the display screen 2, the third step reflection surface receives the information of the third step reflection area sent by the display screen 2, the fourth step reflection surface receives the information of the fourth step reflection area sent by the display screen 2, and so on.
As shown in fig. 5, an included angle a between the outgoing light refracted and reflected by the reflector 4 and the horizontal direction is fixed, that is, a fixed upward included angle is formed between the light reflected by the reflector 4 and the human eyes, and the degree range of the included angle is 40 degrees > a > 20 degrees.
Preferably, the display screen 2 is a monochrome or multi-color display screen 2, and the output image is a monochrome image or a multi-color image. The reflective film 402 is a reflective film 402 or a semi-reflective and semi-transmissive film for a monochromatic display screen 2, or a visible light full-bandwidth reflective film 402 or a semi-reflective and semi-transmissive film for a visible light bandwidth of a multicolor display screen 2. The first lens group 3 and the spectacle lens body 1 are integrated or bonded. The eyeglass lens body 1 is customized to a near-sighted lens or a far-sighted lens or sunglasses or plano glasses according to the degree of curvature of the eyes of the user.
Example two
As shown in fig. 6, unlike the first embodiment, the reflecting surface of the reflector 4 is provided with an inclined surface 403 extending outward, the inclined surface 403 has an inclined angle parallel to the refraction angle of the incident light when entering the eyeglass lens body 1, and the extension amount of the inclined surface 403 is conjugate to the size of the display screen 2.
The light of the display screen 2 is condensed by the first lens group 3 and then enters the glasses lens for refraction, then is reflected and returned by the reflecting surface, and then is refracted and projected by the glasses lens to enter human eyes. In order to make the area of the reflecting surface large enough so that the human eyes can see enough information of the display screen 2, an extension inclined plane 403 is added on the outer side of the glasses lens, and the oblique angle of the extension inclined plane 403 is parallel to the refraction angle when the incident light enters the glasses lens. The extension amount of the extension slope 403 is conjugate to the size of the display screen 2.
Preferably, the first lens group 3 is a convergent positive lens or a divergent negative lens for accommodating the curvature of power of different human eyes. The first lens group 3 may be a converging positive lens or a diverging negative lens to adapt to the curvature of field of human eyes. In order to adapt to the curvature of human eyes and ensure the accurate optical relationship between the reflecting surface and the spectacle lens, the outer curved surface of the spectacle lens is set to have different curvatures according to the curvature of human eyes.
As shown in fig. 7, the light that sends from the geometric center C of display screen 2, adjust (with the user of the different degree of curvature of adaptation) through first lens group 3, refraction to the glasses lens inside, the extension line of this refraction light assembles in D point, the outgoing ray of setting into people's eye is 22 degrees with the horizontal direction contained angle, the light that gets into people's eye simultaneously is the parallel light, retrace this parallel light refraction and get into the light of glasses lens, the extension line that can obtain this parallel light refraction and get into the light of glasses lens will assemble in B point. The curved surface equation of the reflecting surface can be derived based on the geometrical optics principle to be an ellipsoid which passes through the vertex of the epitaxial inclined surface 403 and takes D and B as focal points.
If the extended line of the refracted ray converges at the point D and the intersection point B of the extended line of the reflected ray (the extended line of the ray refracted into the eyeglass lens by the parallel light) is simplified for the convenience of the analysis system, in the actual design, because the point D and the point B change the position due to the change of the direction of the ray emitted from the point C of the geometric center of the display screen 2, the surface type of the reflecting surface must be optimized for many times.
The invention has the beneficial effects that: the image that AR display screen 2 output just in time can be seen to people's eye when looking down, accords with people's eye's vision habit, can not shelter from the sight in the dead ahead, is difficult to arouse people's muscle fatigue.
In light of the foregoing description of the preferred embodiments of the present invention, those skilled in the art can now make various alterations and modifications without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. An AR (augmented reality) spectacle lens with a reflector is characterized by comprising a spectacle lens body, a display screen arranged at the top of the spectacle lens body, a first lens group arranged above the spectacle lens body and the reflector fixed with the spectacle lens body, wherein the reflector is positioned below the spectacle lens body, the inner surface of the reflector is a refraction surface, and the outer surface of the reflector is plated with a reflecting film; an image output by the display screen generates incident light through the first lens group, the incident light enters the inner surface of the reflector, the small-angle incident light is refracted at a large angle on the refraction surface, the refracted light is reflected on the reflection film on the outer surface, and the reflected light is refracted by the refraction surface and then exits;
the reflector is of a stepped structure, the number of steps is more than or equal to 1, and the outer side surface of the reflector and the outer surface of the spectacle lens body belong to the same curved surface;
or the reflecting surface of the reflector is provided with an inclined plane extending outwards, the oblique angle of the inclined plane is parallel to the refraction angle of incident light when the incident light enters the glasses lens body, and the extension amount of the inclined plane is conjugated with the size of the display screen;
the included angle A between the upward emergent light refracted and reflected by the reflector and the horizontal direction is fixed, and the degree range of the included angle is more than 40 degrees and more than 20 degrees.
2. The AR spectacle lens with reflector as claimed in claim 1, wherein the stepped structure of the reflector is adhesively secured.
3. The AR spectacle lens with reflector as claimed in claim 1, wherein the display screen is a monochrome or multi-color display screen, and the output image is a monochrome image or multi-color image.
4. The AR spectacle lens with a reflector according to claim 1 or 3, wherein the reflective film is a reflective film or a semi-reflective and semi-transparent film for a monochromatic display screen, or a reflective film or a semi-reflective and semi-transparent film for a full visible light bandwidth or a visible light bandwidth of a multicolor display screen.
5. The AR spectacle lens with reflector of claim 1, wherein the first lens group is integral with or bonded to the spectacle lens body.
6. The AR spectacle lens with reflector of claim 1, wherein the spectacle lens body is customized to a near-sighted lens or a far-sighted lens or a sunglass or a plano glasses according to the degree of curvature of the user's eye.
7. The AR spectacle lens with reflector of claim 1, wherein the first lens group is designed to be either a converging positive lens or a diverging negative lens depending on the diopter of the human eye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110433262.7A CN113204116B (en) | 2021-04-22 | 2021-04-22 | AR (augmented reality) glasses lens with reflector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110433262.7A CN113204116B (en) | 2021-04-22 | 2021-04-22 | AR (augmented reality) glasses lens with reflector |
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| CN113204116A CN113204116A (en) | 2021-08-03 |
| CN113204116B true CN113204116B (en) | 2023-01-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108227208B (en) * | 2017-09-30 | 2024-03-05 | 北京蚁视科技有限公司 | Reflective hybrid display device |
| CN111273442A (en) * | 2018-12-05 | 2020-06-12 | 北京耐德佳显示技术有限公司 | Ultrathin optical assembly, virtual image imaging method of optical assembly and display device using same |
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