Geometric optical waveguide and diffractive optical waveguide combined optical lens

Abstract

The utility model discloses a geometric optical waveguide and diffraction optical waveguide combined optical lens, which comprises a lens main body, and the lens main body is provided with a coupling-out area and a coupling-in area. The coupling-in area is configured to totally reflect light rays; the coupling-out region is configured to reflect the totally-reflected light into human eyes; the coupling-in area is a reflecting lens with a single reflectivity, different from various different transmission and reflection values required to be manufactured in the prior art, only one reflectivity is required, the manufacturing process is low in difficulty, secondly, the coupling-in area is arranged to be the reflecting lens, and on the basis of the geometrical optics mechanism, the coupling-in area can be used for manufacturing different transmission and reflection values. Light rays generated by the image generator are totally reflected in the lens, when the totally-reflected light rays in the lens reach the diffraction optical waveguide coupling-out area, the light rays are reflected out and enter human eyes to form an image, and different from the prior art, the light ray reflection efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical lens field especially involves an optical lens that geometry light waveguide and diffraction light waveguide combination. BACKGROUND

[0002] Augmented reality (AR) glasses are gradually emerging, and major companies are entering this track, and the technology route is also blooming, each with its own advantages. Optical: the mainstream optical waveguide lens mainly has geometry light waveguide and diffraction light waveguide lens.

[0003] Representatively, such as the patent literature with the application number CN202421242913. X discloses an AR glasses and display system, the AR glasses includes: mirror frame module, the mirror frame module is at least used for providing wearing support for target object;Light waveguide lens, the light waveguide lens is installed in the mirror frame module, the light waveguide lens is formed with the coupling-in grating area and the coupling-out grating area;First display module and second display module, connect to the opposite sides of the mirror frame module and set up relative to the coupling-in grating area, the first display module and the second display module are used for synchronously outputting optical signal to the coupling-in grating area;Wherein, the light waveguide lens is configured to: propagate the optical signal input to the coupling-in grating area to the coupling-out grating area, and output from the coupling-out grating area.

[0004] The above patent literature discloses the AR glasses and display system using the light waveguide lens, but there are limitations in specific use, as follows:

[0005] For geometry light waveguide: the intensity of light in the coupling-in area is the highest, assuming 100%, the multiple mirrors in the coupling-out area are for pupil expansion (the pupil of the eye can see the image when rotating to different positions), in order to make the reflection intensity of each mirror consistent, the reflectivity of each mirror is different, for example, the reflectivity of the first mirror is 20%, and the transmittance is 80%, so the light intensity received by the human eye at the first mirror is 20%, in order to make the reflection of the second mirror also 20%, the reflectivity of the second mirror needs to reach 25%; Similarly, the reflectivity of the third mirror needs to be 36%. All these mirrors can reflect and transmit, and are arranged at a certain angle, which can be arranged in a certain order by using glue or molecular bonding technology, and the shape of the mirror can be designed according to the convenience of the whole AR lens manufacturing process. The difficulty of the process is to manufacture various optical lenses with different transmittance and reflectivity, but similar colors, and then combine them together.

[0006] For the diffractive optical waveguide: light is coupled into the optical lens through the strip grating, is totally reflected in the interior of the lens, and is coupled out from the lens until reaching the coupling-out area, the light is usually coupled into the lens on the side facing the eye, and the coupling-out area is arranged on the other side, since the light coupling-in has no directionality, the light efficiency of the diffraction grating is low.

[0007] Therefore, how to solve the above-mentioned problems existing in the prior art has become the subject to be studied and solved by the utility model. Utility model content

[0008] Therefore, it is necessary to provide an optical lens combined with a geometric optical waveguide and a diffractive optical waveguide in view of the above technical problems.

[0009] In order to solve the above-mentioned technical problems, the utility model adopts the technical scheme as follows:

[0010] An optical lens combined with a geometric optical waveguide and a diffractive optical waveguide, comprising a lens main body, wherein the lens main body is provided with a coupling-out area and a coupling-in area;

[0011] The coupling-in area is configured to totally reflect the light;

[0012] The coupling-out area is configured to reflect the totally reflected light into the human eye;

[0013] The coupling-in area is a reflecting lens with a single reflectivity.

[0014] In the utility model, the coupling-in area is set as a reflecting lens, based on the geometric optical mechanism, the light generated by the image generator is totally reflected in the lens, when the totally reflected light in the lens reaches the coupling-out area of the diffractive optical waveguide, the light is reflected out into the human eye to form an image.

[0015] Different from the prior art which needs to manufacture various different transmission and reflection values, the utility model only needs one reflectivity, and the manufacturing process is low in difficulty, secondly, in the utility model, the coupling-in area is set as a reflecting lens, based on the geometric optical mechanism, the light generated by the image generator is totally reflected in the lens, when the totally reflected light in the lens reaches the coupling-out area of the diffractive optical waveguide, the light is reflected out into the human eye to form an image, different from the prior art in which the light coupling-in has no directionality, the light efficiency of the diffraction grating is low, the light reflection efficiency of the application is high, and the problems in the prior art do not exist.

[0016] Further, the reflective lens is made by evaporation or sputtering.

[0017] Further, the out-coupling region is made by UV imprinting or ion reactive etching.

[0018] Further, the lens body is provided with two lens bodies, and a connecting frame is arranged between the two lens bodies to form a glasses structure.

[0019] Further, the surface edge of the lens body is provided with a protective part for light shielding.

[0020] Further, the protective part includes an edge frame arranged along the surface edge of the lens body, and the edge frame is configured to shield the light entering the eye from the surface edge of the lens body.

[0021] Further, the width of the edge frame is smaller than the distance between the in-coupling region and the surface edge of the lens body.

[0022] Further, the shape of the edge frame is matched with the surface edge of the lens body.

[0023] Further, the edge frame is a strip structure.

[0024] Further, the circumferential edge of the lens body is provided with a protective shielding layer.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] Unlike the prior art which requires the manufacture of various different transmission and reflection values, the present application only requires one reflectivity, and the manufacturing process is difficult. Secondly, in the present application, the in-coupling region is provided as a reflective lens, based on the geometric optics mechanism, the light generated by the image generator is totally reflected inside the lens, and when the totally reflected light inside the lens reaches the out-coupling region of the diffractive optical waveguide, the light is reflected out to enter the human eye to form an image. Unlike the prior art, the light coupling-in has no directionality, and therefore the light efficiency of the diffractive grating is low. The present application has high light reflection efficiency and does not have the problems of the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A principle diagram of light reflection in the lens body is provided for the present application;

[0028] Figure 2 A lens body structure schematic diagram is provided for the present application;

[0029] Figure 3 A second embodiment structure schematic diagram is provided for the present application;

[0030] Figure 4 The third embodiment structure schematic view provided by the utility model;

[0031] Figure 5 The fourth embodiment structure schematic view provided by the utility model.

[0032] The mark in the figure is explained as follows:

[0033] 1, lens main body; 2, coupling-out area; 3, coupling-in area; 4, edge frame; 5, protective shielding layer. Specific implementation

[0034] In order for the personnel in the technical field to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0035] The multiple mirrors of the coupling-out area as described in the background art are for pupil expansion, all of these mirrors are both reflective and transmissive, and are arranged at a certain angle, which can be arranged in a certain order by adhesive bonding or molecular bonding technology. The shape of the reflective mirror can be designed according to the convenience of the entire AR lens manufacturing process. The difficulty of the process is to manufacture various optical lenses with different transmission and reflection values, but similar colors, and then combine them together.

[0036] For the diffractive optical waveguide: light is coupled into the optical lens through the strip grating, and is totally reflected in the lens until it reaches the coupling-out area, and then the light is coupled out of the lens. The coupling-in area of the light is usually arranged on the side of the lens facing the eye, and the coupling-out area is arranged on the other side. Since the light coupling-in has no directionality, the light efficiency of the diffraction grating is low.

[0037] In order to solve this technical problem, the utility model provides a kind of optical lens combined by geometric light waveguide and diffractive light waveguide.

[0038] Specifically, please refer to Figures 1-5 , the optical lens combined by geometric light waveguide and diffractive light waveguide, including lens main body 1, the lens main body 1 has coupling-out area 2 and coupling-in area 3 on it;

[0039] The coupling-in area 3 is configured to totally reflect light;

[0040] The coupling-out area 2 is configured to reflect the totally reflected light into the human eye;

[0041] The coupling-in area 3 is a reflective lens with a single reflectivity.

[0042] In the utility model, the coupling-in area 3 is set as a reflective lens, based on the geometric optical mechanism, the light generated by the image generator is totally reflected in the lens, when the totally reflected light in the lens reaches the diffraction light waveguide coupling-out area 2, the light is reflected to enter the human eye, forming an image. The advantages of this structure are that the reflective lens is made by evaporation or sputtering, without the need to make a plurality of different reflectivities, only one reflectivity is needed, and the film layer color adjustment is relatively simple; the optical coupling-in efficiency of the reflective lens is relatively high and directional compared with the coupling-in efficiency of the diffraction light waveguide, which can save energy consumption; the diffraction light waveguide is made by UV imprinting or ion reaction etching.

[0043] In order for those skilled in the art to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings.

[0044] It should be noted that the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0045] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0046] First embodiment

[0047] A geometric light waveguide and diffraction light waveguide combined optical lens, comprising a lens main body 1, the lens main body 1 has a coupling-out area 2 and a coupling-in area 3 on it;

[0048] The coupling-in area 3 is configured to totally reflect light;

[0049] The coupling-out area 2 is configured to reflect the totally reflected light into the human eye;

[0050] The coupling-in area 3 is a reflective lens with a single reflectivity.

[0051] The utility model discloses a mirror piece is set to the coupling in area 3, based on the geometrical optics mechanism, the light of image generator is totally reflected in the mirror piece inside, when the total reflection light in the mirror piece reaches the diffraction optical waveguide coupling area 2, the light is reflected to enter the human eye, forms the image.

[0052] Distinguish from the need of making various different transmission and reflection value in the prior art, the utility model only needs a reflectivity, and its manufacturing process is low in difficulty, secondly, the mirror piece is set to the coupling in area 3 in the utility model, based on the geometrical optics mechanism, the light of image generator is totally reflected in the mirror piece inside, when the total reflection light in the mirror piece reaches the diffraction optical waveguide coupling area 2, the light is reflected to enter the human eye, forms the image, distinguish from the directionless light coupling in the prior art, therefore the light efficiency of diffraction grating is lower, and the light reflection efficiency of the application is high, and these problems in the prior art do not exist.

[0053] Preferably, the mirror piece is made by evaporation or sputtering. This design is to make only one kind of reflectivity, and the film layer color adjustment is relatively simple.

[0054] Preferably, the coupling area 2 is made by UV imprinting or ion reaction etching.

[0055] Preferably, the mirror body 1 is provided with two, and a connecting frame is arranged between the two mirror bodies 1 to form a glasses structure. With the above design, the preparation of a glasses structure can be quickly completed.

[0056] Second embodiment

[0057] The optical mirror of the combination of the geometrical light waveguide and the diffraction optical waveguide provided in embodiment 1 is further optimized, and the surface edge of the mirror body 1 is provided with a protection part for light shielding.

[0058] When the glasses are worn on the face of the user, light is easily entered from the gap between the edge of the glasses and the face of the user, causing poor imaging effect. In order to solve this problem, the protection part is used for light shielding.

[0059] Preferably, the protection part includes an edge frame 4 arranged along the surface edge of the mirror body 1, and the edge frame 4 is configured to shield the light entering the eye from the surface edge of the mirror body 1.

[0060] The edge frame 4 blocks the gap between the whole edge of the glasses and the face of the user, and in actual work, the edge frame 4 should be adaptively designed according to the skin of the face of the user, that is, more protruding on both sides and less protruding in the middle.

[0061] Preferably, the width of the edge frame 4 is smaller than the distance between the coupling-in area 3 and the surface edge of the lens main body 1. By means of the above design, the edge frame 4 is prevented from blocking the coupling-in area 3.

[0062] Preferably, the shape of the edge frame 4 is matched with the surface edge of the lens main body 1. By means of the above design, the gap between the edge of the glasses and the face of the user is blocked in all directions.

[0063] In the third embodiment, the edge frame 4 is a strip structure.

[0064] Although the second embodiment provides the scheme that the shape of the edge frame 4 is matched with the surface edge of the lens main body 1, the scheme consumes more materials, and in order to solve the problem, the edge frame 4 is a strip structure and is arranged at the surface edge of the lens main body 1 and corresponds to the cheeks of the user.

[0065] The fourth embodiment

[0066] The optical lens of the combination of the geometric light waveguide and the diffractive light waveguide provided in the first or second embodiment is further optimized, and the peripheral edge of the lens main body 1 is provided with a protective shielding layer 5.

[0067] The protective shielding layer 5 can be a black layer and is mainly used for preventing light from entering from the peripheral side of the lens main body 1.

[0068] The use process of the optical lens of the combination of the geometric light waveguide and the diffractive light waveguide provided in the utility model is as follows: unlike the prior art which needs to be made into various different transmission and reflection values, the utility model only needs one reflectivity, and the manufacturing process difficulty is low, and secondly, the coupling-in area 3 is arranged as a reflecting lens, based on the geometric optical mechanism, the light generated by the image generator is totally reflected in the lens, when the totally reflected light in the lens reaches the diffractive light waveguide coupling-out area 2, the light is reflected out to enter the human eye, and an image is formed, and unlike the prior art which has no directionality in the light coupling-in, the light efficiency of the diffractive grating is low, and therefore, the light reflection efficiency of the application is high, and the problems in the prior art do not exist.

[0069] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0070] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, and not all the embodiments, and the preferred embodiments of the utility model are given in the drawings, but do not limit the patent range of the utility model.The utility model can be realized in many different forms, and contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.Although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing each specific embodiment can be modified, or part of the technical features can be replaced equivalently.The equivalent structure made by using the contents of the utility model specification and drawings, direct or indirect use in other related technical fields, are also within the patent protection range of the utility model.

Claims

1. An optical lens combining a geometric waveguide and a diffractive waveguide, characterized in that, It includes a lens body (1), which has an outgoing region (2) and an incoming region (3). The coupling region (3) is configured to perform total internal reflection of light; The coupling region (2) is configured to reflect totally internally reflected light into the human eye; The coupling region (3) is a reflective lens with a single reflectivity.

2. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 1, characterized in that, The reflective lens is fabricated using vapor deposition or sputtering.

3. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 1, characterized in that, The coupling region (2) is fabricated by UV imprinting or ion reactive etching.

4. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 2 or 3, characterized in that, Two lens bodies (1) are provided, and a connecting frame is provided between the two lens bodies (1) to form an eyeglass structure.

5. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 4, characterized in that, The surface edge of the lens body (1) is provided with a protective part for shading light.

6. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 5, characterized in that, The protective part includes an edge frame (4) disposed along the edge of the surface of the lens body (1), the edge frame (4) being configured to block light from entering the eye from the edge of the surface of the lens body (1).

7. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 6, characterized in that, The width of the edge frame (4) is less than the distance between the coupling area (3) and the edge of the surface of the lens body (1).

8. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 7, characterized in that, The shape of the edge frame (4) is set to match the surface edge of the lens body (1).

9. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 7, characterized in that, The edge frame (4) is a strip structure.

10. The optical lens of the combination of geometric waveguide and diffractive waveguide according to claim 4, characterized in that, The lens body (1) has a protective shielding layer (5) on its peripheral edge.

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