Universal AR optical waveguide lens and production process

Abstract

The invention relates to the field of optical waveguide lenses, in particular to a universal AR optical waveguide lens which comprises a waveguide substrate and resin, the waveguide substrate is embedded in the resin, the waveguide substrate comprises a waveguide layer, a coupling input area and a coupling output area, and the coupling input area and the coupling output area are both connected to the outer wall of the waveguide layer. The coupling input area is arranged on the edge of the waveguide layer, and the coupling output area is arranged in the middle of the waveguide layer. The coupling input area guides a display light source into the waveguide layer, the waveguide layer guides light through transmission, refraction, reflection or diffraction, and the coupling output area guides the light to human eyes from waveguides to realize imaging. The resin plays a role in buffering and protecting the waveguide substrate, the waveguide substrate is implanted into the resin, standard optical waveguide lenses with various gradient diopters can be made, optical waveguide sheets can be customized according to personal eyesight conditions, and the optical waveguide lens is suitable for users with various eyesight.

Description

Technical Field

[0001] The present application relates to the field of optical waveguide lenses, and in particular to a universal AR optical waveguide lens. Background Art

[0002] An optical waveguide is a structure used to guide the propagation of light waves (electromagnetic waves in the optical frequency band). Typically made of a high-refractive-index dielectric material, it confines light along a specific path through the principle of total internal reflection. It is a core component of modern optical communications, integrated optics, and photonic devices.

[0003] Augmented reality (AR) optical waveguide lenses are the core optical components of AR glasses. They transmit images from microdisplays to the human eye through waveguide structures while keeping the lenses light, thin and transparent.

[0004] However, when myopic or hyperopic users wear optical waveguide AR glasses, since traditional optical waveguides only process the virtual light path from the display source and do not change the actual light path, myopic or hyperopic users will not be able to see the image clearly, affecting the user experience. Summary of the Invention

[0005] In order to be suitable for more users, this application provides a universal AR optical waveguide lens and production process.

[0006] In the first aspect, the present application provides a universal AR optical waveguide lens adopting the following technical solutions: A universal AR optical waveguide lens includes a waveguide substrate and a resin. The waveguide substrate is embedded in the resin. The waveguide substrate includes a waveguide layer, a coupling input region, and a coupling output region. The coupling input region and the coupling output region are both connected to the outer wall of the waveguide layer. The coupling input region is located at the edge of the waveguide layer, and the coupling output region is located in the middle of the waveguide layer.

[0007] By employing this technical solution, the input coupling region directs the display light source into the waveguide layer, which then guides the light through transmission, refraction, reflection, or diffraction. The output coupling region then directs the light from the waveguide to the eye, achieving imaging. The resin acts as a buffer and protector for the waveguide substrate. By embedding the waveguide substrate within the resin, standard waveguide lenses with various gradient diopters can be created. These waveguide lenses can also be customized based on individual vision conditions, making them suitable for users with varying vision needs.

[0008] Preferably, it further comprises a packaging layer, which is provided between the waveguide substrate and the resin, with two sides of the packaging layer fixedly connected to the waveguide substrate and the resin respectively, and the packaging layer is used to match the refractive index of the waveguide substrate and the resin.

[0009] By adopting the above technical solution, the refractive index of the packaging layer matches the waveguide substrate and resin, reducing light loss and scattering, lowering the impact on the clarity of the virtual image, protecting the waveguide substrate, and facilitating user use. At the same time, it has a certain degree of stain resistance. Since the waveguide substrate uses high refractive index, there can be a layer of low-refractive glue or other medium between the resin and the waveguide. As long as the total reflection conditions are met, even if the lens surface is dirty during the propagation process, it will not affect the light propagation and the clarity of the virtual image.

[0010] Preferably, it further comprises a transparent graphene film, wherein the transparent graphene film is fixedly connected to the outer wall of the resin.

[0011] By adopting the above technical solution, the transparent graphene film is fixedly connected to the surface of the resin, which facilitates heat dissipation, reduces thermal expansion of the resin, reduces delamination of the waveguide substrate and the resin due to temperature changes, and improves the optical performance and durability of the lens.

[0012] Preferably, it also includes a phase change material and a heat conductive block, the resin is provided with a flow channel, the flow channel is provided in the coupling input area, the coupling output area and the periphery, the outer wall of the resin is provided with a through hole, the through hole is connected to the flow channel, the phase change material is filled in the flow channel, the heat conductive block is slidably connected to the inner wall of the through hole, the heat conductive block is used to abut the transparent graphene film, the transparent graphene film is provided with air holes, and the air holes are connected to the through hole.

[0013] By adopting the above technical solution, the phase change material can absorb latent heat and reduce the excessive temperature of the resin. After absorbing heat, the phase change material liquefies, and the volume expansion drives the heat conductive block to move against the transparent graphene film, promoting heat dissipation, reducing the stratification of the waveguide substrate and resin due to temperature changes, and improving the optical performance and durability of the lens.

[0014] Preferably, it also includes a heat-conducting ring and a memory alloy, the heat-conducting ring is arranged in the flow channel, the inner wall of the heat-conducting ring is fixedly connected to a heat-conducting rod, the heat-conducting rod is fixedly connected to the resin, the memory alloy is arranged between the heat-conducting block and the heat-conducting ring, one end of the memory alloy is fixedly connected to the heat-conducting ring, and the other end of the memory alloy is used to abut the heat-conducting block.

[0015] By adopting the above technical solution, the heat-conducting rod facilitates the transfer of heat from the inside of the lens to the heat-conducting block through the heat-conducting ring and the memory alloy. The heat-conducting block abuts against the transparent graphene film to achieve rapid heat dissipation. When the temperature inside the lens drops, the air pressure difference causes the heat-conducting block to reset.

[0016] Preferably, it further comprises a breathable piezoelectric film, which is fixedly connected to the inner wall of the breathable hole. An end of the heat conductive block facing away from the phase change material is fixedly connected to an abutting column, which is used to abut the breathable piezoelectric film.

[0017] By adopting the above technical solution, gas passes through the breathable piezoelectric film to induce mechanical deformation of the film and activate the piezoelectric effect, thereby realizing electrical signal transmission. When the heat conductive block abuts the transparent graphene film, the abutting column abuts the breathable piezoelectric film to cause it to deform, activating the piezoelectric effect.

[0018] Preferably, it further comprises a controller and a micro fan, both of which are fixedly connected to the mirror frame, the controller is electrically connected to the micro fan and the air-permeable piezoelectric film, and the air outlet of the micro fan faces the resin.

[0019] By adopting the above technical solution, the breathable piezoelectric film sends an electrical signal to the controller, and the controller controls the micro fan to start to dissipate heat from the resin, thereby reducing the probability of resin deformation and improving structural stability.

[0020] In the second aspect, the present application provides a universal AR optical waveguide lens production process using the following technical solutions: A universal AR optical waveguide lens production process includes the following steps: Coating an encapsulation layer on the outer surface of the waveguide substrate; Implanting the waveguide substrate coated with the packaging layer into a casting mold of the resin lens; The resin lens casting mold is pre-installed with a frame for allowing the resin to form a passage. The frame can complete the positioning of the heat conduction block and implant the solid phase change material and the heat conduction block into the resin lens casting mold. Filling the resin lens casting mold with resin; After the resin solidifies, the mold is opened and the frame and the sheet are separated to form a through hole for the resin; Cut and polish the formed sheet into lenses of the required degree; Fixing the transparent graphene membrane and the breathable piezoelectric film; Check the product.

[0021] By adopting the above technical solution, by implanting a high-refractive waveguide substrate into the casting mold of resin glasses, standard optical waveguide glasses original lenses with various gradient refractive powers can be made, and waveguide lenses can be customized according to individual vision conditions. By implanting a dispersion compensation film into the casting mold of resin glasses, the imaging quality of the waveguide lens can be improved. By implanting a solid-state phase change material into the casting mold of the resin lens, the stability of the waveguide lens can be reduced.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The coupling input area directs the display light source into the waveguide layer, which guides the light through transmission, refraction, reflection, or diffraction. The coupling output area directs the light from the waveguide to the human eye, achieving imaging. The resin acts as a buffer and protector for the waveguide substrate. By embedding the waveguide substrate into the resin, standard waveguide lenses with various gradient diopters can be made. Waveguide lenses can also be customized based on individual vision conditions, making them suitable for users with varying vision. 2. The refractive index of the encapsulation layer matches the waveguide substrate and resin, reducing light loss and scattering, lowering the impact on virtual image clarity, protecting the waveguide substrate, and facilitating user use. At the same time, it has a certain degree of stain resistance. Since the waveguide substrate uses a high refractive index, a layer of low-refractive glue or other medium can be placed between the resin and the waveguide. As long as the total reflection condition is met, even if the lens surface is contaminated during light propagation, it will not affect the light propagation and the clarity of the virtual image. 3. By implanting a high-refractive waveguide substrate into the casting mold of resin glasses, standard optical waveguide glasses with various gradient refractive powers can be made, and waveguide lenses can be customized according to individual vision conditions. By implanting a dispersion compensation film into the casting mold of resin glasses, the imaging quality of the waveguide lens can be improved. By implanting a solid-state phase change material into the casting mold of the resin lens, the stability of the waveguide lens can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the waveguide substrate.

[0024] Figure 2 This is a cross-sectional view of the universal AR optical waveguide lens in Example 1.

[0025] Figure 3 This is a cross-sectional view of the universal AR optical waveguide lens in Example 2.

[0026] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0027] Explanation of the accompanying symbols: 1. Waveguide substrate; 11. Waveguide layer; 12. Coupling input region; 13. Coupling output region; 2. Resin; 21. Front refractive lens; 22. Back refractive lens; 221. Flow channel; 222. Through port; 3. Packaging layer; 5. Transparent graphene film; 51. Air vent; 6. Heat sink; 61. Phase change material; 62. Heat-conducting ring; 621. Heat-conducting rod; 63. Heat-conducting block; 631. Abutment column; 64. Memory alloy; 65. Breathable piezoelectric film; 66. Controller; 67. Micro fan. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] The embodiment of the present application discloses a universal AR optical waveguide lens.

[0030] Example 1 Reference Figure 1 and Figure 2 The universal AR optical waveguide lens includes a waveguide substrate 1, a resin 2 and a packaging layer 3.

[0031] Reference Figure 2 The waveguide substrate 1 is embedded in the resin 2 , and the resin 2 includes a front refractive lens 21 and a back refractive lens 22 .

[0032] Reference Figure 1 and Figure 2 The waveguide substrate 1 includes a waveguide layer 11, an input coupling region 12, and an output coupling region 13. Both the input coupling region 12 and the output coupling region 13 are fixedly connected to the outer wall of the waveguide layer 11 facing the rear refractive lens 22. The input coupling region 12 guides the display light source into the waveguide layer 11, which guides the light through total internal reflection or diffraction. The output coupling region 13 guides the light from the waveguide to the human eye to achieve imaging.

[0033] The packaging layer 3 is arranged between the waveguide substrate 1 and the resin 2. The two sides of the packaging layer 3 are fixedly connected to the waveguide substrate 1 and the resin 2 respectively. The packaging layer 3 has two layers. The two sides of one packaging layer 3 are fixedly connected to the waveguide layer 11 and the front refractive lens 21 respectively, and the two sides of the other waveguide layer 11 are fixedly connected to the waveguide layer 11 and the back refractive lens 22 respectively. The packaging layer 3 is used to match the refractive index of the waveguide substrate 1 and the resin 2. The packaging layer 3 is set as resin or glue. The packaging layer 3 adopts a gradient refractive index structure. The packaging layer 3 gradually changes according to the refractive index of the waveguide substrate 1 and the resin 2.

[0034] The implementation principle of Example 1 is as follows: the coupling input region 12 guides the display light source into the waveguide layer 11, the waveguide layer 11 guides the light through total internal reflection or diffraction, and the coupling output region 13 guides the light from the waveguide to the human eye to achieve imaging. The resin 2 acts as a buffer and protector for the waveguide substrate 1. By implanting the waveguide substrate 1 into the resin 2, standard optical waveguide lenses with various gradient refractive powers can be made. The optical waveguide lens can be customized according to individual vision conditions and is suitable for users with various vision conditions. The encapsulation layer 3 matches the refractive index of the waveguide substrate 1 and the resin 2.

[0035] Example 2 Reference Figure 3 The universal AR optical waveguide lens also includes a transparent graphene film 5 and a heat sink 6.

[0036] Reference Figure 3 and Figure 4 The heat sink 6 includes a phase change material 61 , a heat conducting ring 62 , a heat conducting block 63 , a memory alloy 64 , a breathable piezoelectric film 65 , a controller 66 and a micro fan 67 .

[0037] Reference Figure 2 and Figure 3 The transparent graphene film 5 is fixedly connected to the outer wall of the resin 2. The back refractive lens 22 is provided with a flow channel 221, which is provided at the periphery of the coupling input area 12 and the coupling output area 13, and the two ends of the flow channel 221 are connected to each other.

[0038] Reference Figure 3 and Figure 4 The phase change material 61 is filled in the flow channel 221, and the heat-conducting ring 62 is arranged in the flow channel 221. The heat-conducting ring 62 is arranged along the extension direction of the flow channel 221. The inner wall of the heat-conducting ring 62 is fixedly connected with a heat-conducting rod 621, and the heat-conducting rod 621 is fixedly connected to the resin 2.

[0039] The outer wall of the rear refractive lens 22, facing away from the waveguide layer 11, is provided with an opening 222, which connects to the flow channel 221. Multiple openings 222 are provided, evenly spaced along the extension direction of the flow channel 221. In this embodiment, there are four openings 222. A heat-conducting block 63 is slidably connected to the inner wall of the opening 222. Its two ends respectively abut the phase-change material 61 and the transparent graphene film 5. The transparent graphene film 5 is provided with air holes 51, which connect to the opening 222. The phase-change material 61 is a dodecanoic acid / tetradecanoic acid eutectic mixture with a phase transition temperature of 38-42°C, suitable for ergonomics. One end of the memory alloy 64 is fixedly connected to the heat-conducting ring 62, while the other end of the memory alloy 64 abuts the heat-conducting block 63.

[0040] Reference Figure 3 and Figure 4 The breathable piezoelectric film 65 is fixedly connected to the inner wall of the air hole 51. The end of the heat conductive block 63 facing away from the phase change material 61 is fixedly connected to an abutment post 631, which is used to abut the breathable piezoelectric film 65. The controller 66 and micro fan 67 are both fixedly connected to the frame. The controller 66 is electrically connected to the micro fan 67 and the breathable piezoelectric film 65. The air outlet of the micro fan 67 faces the resin 2. The display light source is electrically connected to the controller 66 to power the controller 66, so that the controller 66 and the optical waveguide imaging are turned on together.

[0041] The implementation principle of Example 2 is as follows: the transparent graphene film 5 dissipates heat to the lens. When the temperature of the lens rises, the phase change material 61 can absorb heat and turn into liquid. The expansion of the liquid pushes the heat conductive block 63 to move. The deformation and elongation of the memory alloy 64 assist in pushing the heat conductive block 63 to move, causing the breathable piezoelectric film 65 to undergo mechanical deformation and transmit the electrical signal to the controller 66. The controller 66 receives the signal to control the rotation of the micro fan 67 to dissipate heat to the lens.

[0042] The present application also discloses a universal AR optical waveguide lens production process. Figure 3 A general AR optical waveguide lens production process includes the following steps: Coating a packaging layer 3 on the outer surface of the waveguide substrate 1; Implanting the waveguide substrate 1 coated with the packaging layer 3 into a casting mold of a resin lens; Pre-install the heat-conducting ring 62 and the memory alloy 64 into the solid phase change material 61; The resin lens casting mold is pre-installed with a frame for forming a through hole 222 for the resin 2. The frame can complete the positioning of the heat conducting block 63 and implant the solid phase change material 61 and the heat conducting block 63 into the resin lens casting mold. Filling the resin lens casting mold with resin 2; After the resin 2 solidifies, the mold is opened and the frame and the sheet are separated so that the resin 2 forms a through opening 222; Cut and polish the formed sheet into lenses of the required degree; Fixing the transparent graphene membrane and the breathable piezoelectric film; Check the product.

[0043] The implementation principle of a universal AR optical waveguide lens production process in an embodiment of the present application is: by implanting a high-refractive waveguide substrate 1 into the casting mold of the resin 2 glasses, standard optical waveguide glasses original lenses with various gradient refractive powers can be made, and the waveguide lenses can be customized according to personal vision conditions. By implanting a solid-state phase change material 61 into the casting mold of the resin 2 lens, the stability of the waveguide lens is improved.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A universal AR optical waveguide lens, characterized by: The invention comprises a waveguide substrate (1) and a resin (2), wherein the waveguide substrate is embedded in the resin (2), the waveguide substrate (1) comprises a waveguide layer (11), a coupling input region (12) and a coupling output region (13), the coupling input region (12) and the coupling output region (13) are both connected to the outer wall of the waveguide layer (11), the coupling input region (12) is arranged at the edge of the waveguide layer (11), and the coupling output region (13) is arranged in the middle of the waveguide layer (11).

2. The universal AR waveguide lens according to claim 1, characterized in that: The invention also includes a packaging layer (3), which is arranged between the waveguide substrate (1) and the resin (2), and two sides of the packaging layer (3) are fixedly connected to the waveguide substrate (1) and the resin (2), respectively, and the packaging layer (3) is used to match the refractive index of the waveguide substrate (1) and the resin (2).

3. The universal AR waveguide lens according to claim 1, wherein: It also includes a transparent graphene film (5), wherein the transparent graphene film (5) is fixedly connected to the outer wall of the resin (2).

4. The universal AR waveguide lens according to claim 3, wherein: The resin (2) is provided with a flow channel (221), the flow channel (221) is provided in the coupling input area (12), the coupling output area (13) and the periphery, the outer wall of the resin (2) is provided with a through-hole (222), the through-hole (222) is connected to the flow channel (221), the phase change material (61) is filled in the flow channel (221), the heat conductive block (63) is slidably connected to the inner wall of the through-hole (222), the heat conductive block (63) is used to abut against the transparent graphene film (5), the transparent graphene film (5) is provided with an air vent (51), and the air vent (51) is connected to the through-hole (222).

5. The universal AR waveguide lens according to claim 4, characterized in that: It also includes a heat-conducting ring (62) and a memory alloy (64), wherein the heat-conducting ring (62) is arranged in the flow channel (221), the inner wall of the heat-conducting ring (62) is fixedly connected to a heat-conducting rod (621), and the heat-conducting rod (621) is fixedly connected to the resin (2), and the memory alloy (64) is arranged between the heat-conducting block (63) and the heat-conducting ring (62), one end of the memory alloy (64) is fixedly connected to the heat-conducting ring (62), and the other end of the memory alloy (64) is used to abut the heat-conducting block (63).

6. The universal AR waveguide lens according to claim 4, characterized in that: It also includes a breathable piezoelectric film (65), the breathable piezoelectric film (65) is fixedly connected to the inner wall of the breathable hole (51), and the end of the heat conductive block (63) facing away from the phase change material (61) is fixedly connected to an abutment column (631), and the abutment column (631) is used to abut the breathable piezoelectric film (65).

7. The universal AR waveguide lens according to claim 6, characterized in that: The mirror further comprises a controller (66) and a micro fan (67), wherein the controller (66) and the micro fan (67) are both fixedly connected to the mirror frame, the controller (66) is electrically connected to the micro fan (67) and the air-permeable piezoelectric film (65), and the air outlet of the micro fan (67) faces the resin (2).

8. A process for producing a universal AR optical waveguide lens, applied to the universal AR optical waveguide lens according to any one of claims 6-7, characterized in that: The following steps are involved: Coating an encapsulation layer (3) on the outer surface of the waveguide substrate (1); Implanting the waveguide substrate (1) coated with the packaging layer (3) into a casting mold of a resin lens; A frame for forming a through-hole (222) for the resin (2) is pre-installed in the casting mold of the resin lens. The frame can complete the positioning of the heat-conducting block (63) and implant the solid phase change material (61) and the heat-conducting block (63) into the casting mold of the resin lens. Filling the resin lens casting mold with resin (2); After the resin (2) solidifies, the mold is opened, and the frame and the sheet are separated so that the resin (2) forms a through hole (222); Cut and polish the formed sheet into lenses of the required degree; fixing a transparent graphene film (5) and a gas-permeable piezoelectric film (65); Check the product.

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