Optical waveguide spectacle lens device

Abstract

The utility model provides an optical waveguide glasses lens device which comprises an optical waveguide substrate. The coupling-in grating and the coupling-out grating are fixedly arranged on the upper surface of the optical waveguide substrate; the cover plate is connected with the optical waveguide substrate through a bonding layer, and the cover plate is arranged above the optical waveguide substrate; the transparent curing layer is arranged between the optical waveguide substrate and the cover plate; wherein the coupling-in grating, the coupling-out grating and the transparent curing layer are used for reducing energy loss in the optical waveguide. According to the utility model, the coupling-in grating and the coupling-out grating are arranged between the optical waveguide substrate and the cover plate, the energy loss in the optical waveguide can be prevented from being reduced in the light propagation process through the transparent curing layer, and the transparent curing layer can also prevent the haze around the coupling-in grating and the coupling-out grating, so that the light transmission efficiency is improved. The transmittance of the optical waveguide spectacle lens device is improved.

Description

Technical Field

[0001] This utility model relates to the field of lens device technology, and in particular to an optical waveguide eyeglass lens device. Background Technology

[0002] Polarizing volume gratings made of cholesteric liquid crystals (PVGs) are characterized by high diffraction efficiency and good uniformity. In recent years, research institutions and companies have been studying their application in enhanced display smart glasses lenses, and significant breakthroughs have been achieved, leading to their commercialization. PPVGs are known in the industry as polarizing volume gratings. Practical PVG optical waveguide devices mainly consist of a lower substrate, an alignment layer, a liquid crystal layer, and an upper substrate.

[0003] In existing technologies, because both the alignment layer and the liquid crystal layer are colored and cover the entire substrate, the alignment layer and liquid crystal layer are also retained in gratings or display areas where no functional areas are required. This approach causes significant light loss during propagation and increases haze around the grating, thereby reducing the transmittance of the device. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide an optical waveguide eyeglass lens device to overcome the shortcomings of the prior art.

[0005] This utility model provides an optical waveguide eyeglass lens device, comprising:

[0006] Optical waveguide substrate;

[0007] Both the ingress grating and the egress grating are fixed on the upper surface of the optical waveguide substrate;

[0008] A cover plate is connected to the optical waveguide substrate via an adhesive layer, and the cover plate is disposed above the optical waveguide substrate;

[0009] A transparent curing layer is disposed between the optical waveguide substrate and the cover plate;

[0010] The incident grating, the egress grating, and the transparent curing layer are used to reduce energy loss in the optical waveguide.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by setting an incident grating and an exit grating between the optical waveguide substrate and the cover plate, and by using a transparent curing layer, energy loss in the optical waveguide can be reduced during light propagation. In addition, the transparent curing layer can also prevent haze around the incident grating and the exit grating, thereby improving the transmittance of the optical waveguide eyeglass lens device.

[0012] Furthermore, both the incident grating and the outgoing grating are fixed to the upper surface of the optical waveguide substrate using transparent curable adhesive.

[0013] Furthermore, the coupled grating includes a first substrate, a first alignment layer, and a first cholesteric liquid crystal layer stacked sequentially from bottom to top, with the first substrate fixed to the upper surface of the optical waveguide substrate.

[0014] Furthermore, the first cholesteric liquid crystal layer is formed into a first thin film layer by ultraviolet curing.

[0015] Furthermore, the eccentric grating includes a second substrate, a second alignment layer, and a second cholesteric liquid crystal layer stacked sequentially from bottom to top, with the second substrate fixed to the upper surface of the optical waveguide substrate.

[0016] Furthermore, the second cholesteric liquid crystal layer is formed into a second thin film layer by ultraviolet curing.

[0017] Furthermore, the adhesive layer is made of resin adhesive.

[0018] Furthermore, the transparent curing layer is a transparent UV-curable adhesive. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the optical waveguide eyeglass lens device in an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the coupled grating in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the intermittent grating in an embodiment of the present invention.

[0022] Explanation of key component symbols:

[0023] 11. Destination grating; 111. First substrate; 112. First alignment layer; 113. First cholesteric liquid crystal layer;

[0024] 12. Intermittent grating; 121. Second substrate; 122. Second alignment layer; 123. Second cholesteric liquid crystal layer;

[0025] 201. Cover plate; 202. Adhesive layer; 203. Optical waveguide substrate; 204. Transparent curing layer.

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 3 The image shown is an optical waveguide eyeglass lens device in an embodiment of the present invention, including an optical waveguide substrate 203, an incident grating 11, an outgoing grating 12, a cover plate 201, and a transparent curing layer 204.

[0031] Both the incident grating 11 and the egress grating 12 are fixed on the upper surface of the optical waveguide substrate 203. In this embodiment, both the incident grating 11 and the egress grating 12 are fixed on the upper surface of the optical waveguide substrate 203 by transparent curing adhesive. The cover plate 201 is connected to the optical waveguide substrate 203 by an adhesive layer 202. The cover plate 201 is disposed above the optical waveguide substrate 203. The transparent curing layer 204 is disposed between the optical waveguide substrate 203 and the cover plate 201. The incident grating 11, the egress grating 12, and the transparent curing layer 204 are used to reduce energy loss in the optical waveguide.

[0032] It is worth noting that the incident grating 11 and the incident grating 12 are fixed to the left and right sides of the upper surface of the optical waveguide substrate 203 using transparent light-curing adhesive.

[0033] Specifically, in this embodiment, the coupled grating 11 includes a first substrate 111, a first alignment layer 112 and a first cholesteric liquid crystal layer 113 stacked sequentially from bottom to top. The first substrate 111 is fixed on the upper surface of the optical waveguide substrate 203, and the first cholesteric liquid crystal layer 113 is formed into a first thin film layer by ultraviolet curing.

[0034] It should be explained that the first alignment layer 112, after being exposed by high-power circularly polarized laser light, forms liquid crystal molecules that have an orientation effect on the first cholesteric liquid crystal layer 113.

[0035] Specifically, in this embodiment, the eccentric grating 12 includes a second substrate 121, a second alignment layer 122, and a second cholesteric liquid crystal layer 123 stacked sequentially from bottom to top. The second substrate 121 is fixed on the upper surface of the optical waveguide substrate 203, and the second cholesteric liquid crystal layer 123 is formed into a second thin film layer by ultraviolet curing.

[0036] It should be explained that the second orientation layer 122, after being exposed by high-power circularly polarized laser light, forms a liquid crystal molecule that has an orientation effect on the second cholesteric liquid crystal layer 123.

[0037] In this embodiment, the adhesive layer 202 is made of resin adhesive, and the transparent curing layer 204 is a transparent ultraviolet curable adhesive. The height of the adhesive layer 202 is greater than the height of the coupler grating 11. The adhesive layer 202 is used to bond the cover plate 201 and the optical waveguide substrate 203, thereby forming a box. The box is filled with a transparent ultraviolet curable adhesive with the same refractive index as the cover plate 201 and the optical waveguide substrate 203. The transparent ultraviolet curable adhesive serves as a transparent curing layer.

[0038] In summary, the optical waveguide eyeglass lens device in the above embodiments of this utility model does not have a reduced transmittance due to the addition of material layers. At the same time, it can reduce the amount of material used and save costs. The part of the optical waveguide substrate 203 between the incident grating 11 and the incident grating 12 has the function of light propagation. This part does not have an alignment layer and a liquid crystal layer, but is replaced by a transparent adhesive with the same refractive index as the optical waveguide substrate 203 and the cover plate 201. The absence of the influence of multi-layer interfaces and high roughness of material films reduces energy loss during the optical waveguide process.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An optical waveguide eyeglass lens device, characterized by, The application relates to an optical waveguide substrate, an in-coupling grating and an out-coupling grating, which are fixed on the upper surface of the optical waveguide substrate, a cover plate connected to the optical waveguide substrate through an adhesive layer, and a transparent curing layer arranged between the optical waveguide substrate and the cover plate. The in-coupling grating and the out-coupling grating are fixed on the upper surface of the optical waveguide substrate through a transparent curing glue. The in-coupling grating comprises a first substrate, a first orientation layer and a first cholesteric liquid crystal layer which are stacked in sequence from bottom to top, and the first substrate is fixed on the upper surface of the optical waveguide substrate. The first cholesteric liquid crystal layer is formed into a first thin film layer through ultraviolet curing. The out-coupling grating comprises a second substrate, a second orientation layer and a second cholesteric liquid crystal layer which are stacked in sequence from bottom to top, and the second substrate is fixed on the upper surface of the optical waveguide substrate. The second cholesteric liquid crystal layer is formed into a second thin film layer through ultraviolet curing.

2. The optical waveguide eyeglass lens device of claim 1, wherein, The adhesive layer is made of resin glue.

3. The optical waveguide eyeglass lens device of claim 1, wherein, The transparent curing layer is transparent ultraviolet curing glue.

4. The optical waveguide eyeglass lens device of claim 3, wherein, ​ 5. The optical waveguide eyeglass lens device according to claim 1, wherein, ​ 6. The optical waveguide eyeglass lens device of claim 5, wherein, ​ 7. The optical waveguide eyeglass lens device according to claim 1, wherein, ​ 8. The optical waveguide eyeglass lens device according to claim 1, wherein, ​

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