Volume holographic optical waveguide exposure structure and assembling, disassembling and assembling and disassembling device thereof

Abstract

The utility model discloses a volume holographic optical waveguide exposure structure and an assembling, disassembling and assembling and disassembling device thereof. The exposure structure comprises a volume holographic optical waveguide, a prism, light-absorbing glass and a jig, wherein the jig comprises a first jig and / or a second jig; the volume holographic optical waveguide is provided with a first surface and a second surface which are opposite to each other, the prism covers the first surface of the volume holographic optical waveguide, the light-absorbing glass covers the second surface of the volume holographic optical waveguide, the first jig is arranged between the prism and the volume holographic optical waveguide, and the second jig is arranged between the light-absorbing glass and the volume holographic optical waveguide; a first through hole is formed in the center of the first jig, one end of the first through hole is communicated with the surface of the holographic optical waveguide, the other end of the first through hole is communicated with the surface of the prism, and a first closed space filled with refractive index matching oil is defined by the three; a second through hole is formed in the center of the second jig, one end of the second through hole is communicated with the surface of the holographic optical waveguide, the other end of the second through hole is communicated with the surface of the light-absorbing glass, and a second closed space filled with refractive index matching oil is defined by the three.

Description

Technical Field

[0001] The present invention belongs to the technical field of volume holographic waveguides, and specifically relates to a volume holographic waveguide exposure structure and an assembly, disassembly, and mounting / disassembly device thereof. Background Art

[0002] With the rapid development of augmented reality (AR) and virtual reality (VR) technologies, volume holographic waveguides serve as a bridge between the digital and physical worlds. The quality of their manufacturing process directly determines the performance and user experience of the device. The exposure process, a core step in volume holographic waveguide production, plays a crucial role in the formation of the grating structure within the waveguide.

[0003] The core of the volume holographic waveguide exposure process is to use lasers or specific light sources to form fine grating structures inside the waveguide. These structures can guide light to propagate along a predetermined path, achieving efficient coupling and transmission of images. During this process, the volume holographic waveguide needs to be precisely placed on a special prism, and refractive index matching oil is added between the two to ensure seamless transmission of light. At the same time, in order to absorb light from unintended directions and improve the clarity and contrast of the exposed image, the upper surface of the volume holographic waveguide will be covered with a layer of light-absorbing glass, and refractive index matching oil also needs to be added between the two. After the exposure is completed, the volume holographic waveguide needs to be disassembled from the prism and light-absorbing glass. However, it is these seemingly simple steps that hide many challenges in actual operation.

[0004] First, when adding refractive index matching oil, controlling the thickness and diffusion area of ​​the oil film becomes a major challenge. Excessively thick or thin oil films, as well as uneven diffusion areas, can affect the efficiency of light transmission between the volume holographic waveguide, the prism, and the light-absorbing glass, leading to reduced exposure quality. This not only requires highly specialized operator skills and extensive experience, but also relies on tedious manual debugging and monitoring processes, significantly reducing production efficiency.

[0005] Secondly, the difficulty in disassembling the volume holographic waveguide from the prism and light-absorbing glass is also a significant issue. Due to the adsorption force of the oil film, these components tend to form strong adhesion, making separation extremely difficult after exposure. Manual prying is not only inefficient but also easily damages the volume holographic waveguide, affecting its optical performance. The inefficiency and instability of this process further exacerbate rising production costs and fluctuating product quality.

[0006] Furthermore, before and after each wafer placement and unloading, the prisms, volume holographic waveguides, and absorber glass require thorough cleaning to remove residual index-matching oil and dust. This step is not only time-consuming and labor-intensive, but also requires highly precise operation to ensure the required surface cleanliness of the components. Incomplete cleaning can lead to contamination of the optical interfaces, affecting exposure quality and potentially even requiring the entire production line to be shut down and re-commissioned. Utility Model Content

[0007] This solution aims to overcome at least one defect in the prior art and provide a volume holographic waveguide exposure structure and its assembly, disassembly, and installation and disassembly device to solve the problem of difficult control of the thickness and diffusion area of ​​the oil film.

[0008] In order to solve the above technical problems, the following technical solutions are adopted:

[0009] In a first aspect, a volume holographic optical waveguide exposure structure is proposed. The exposure structure includes a volume holographic waveguide, a prism, a light-absorbing glass, and a jig, wherein the jig includes a first jig and / or a second jig. The volume holographic waveguide has a first surface and a second surface opposite to each other. The prism covers the first surface of the volume holographic waveguide, and the light-absorbing glass covers the second surface of the volume holographic waveguide. The first jig is arranged between the prism and the volume holographic waveguide, and the second jig is arranged between the light-absorbing glass and the volume holographic waveguide. A first through hole is provided in the center of the first jig. One end of the first through hole is connected to the surface of the volume holographic waveguide and the other end is connected to the surface of the prism. The volume holographic waveguide, the first jig, and the prism together form a first closed space. The first closed space is filled with refractive index matching oil. A second through hole is provided in the center of the second jig. One end of the second through hole is connected to the surface of the volume holographic waveguide and the other end is connected to the surface of the light-absorbing glass. The volume holographic waveguide, the second jig, and the light-absorbing glass together form a second closed space. The second closed space is filled with refractive index matching oil.

[0010] This solution achieves precise control of the thickness and diffusion area of ​​the refractive index matching oil between the volume holographic waveguide and the prism through the first fixture, and precisely controls the thickness and diffusion area of ​​the refractive index matching oil between the volume holographic waveguide and the light-absorbing glass through the second fixture. This precise control is crucial for ensuring the performance of the optical waveguide, as it effectively reduces light reflection losses at the interface between the waveguide and the prism (or light-absorbing glass), thereby improving light transmission efficiency. The introduction of the fixture not only provides a stable carrying space for the refractive index matching oil but also effectively prevents leakage or diffusion of the matching oil during the exposure process by enclosing the first and second enclosed spaces. This closed design ensures a stable exposure process. The fixed volume of the first and second enclosed spaces also makes the refractive index matching oil filling amount precisely controllable, facilitating simple and rapid refractive index matching oil filling, thereby improving production efficiency.

[0011] The first jig is preferably configured as a frame structure, with its inner wall forming a first through-hole; the second jig is preferably configured as a frame structure, with its inner wall forming a second through-hole. The frame structure design helps minimize the size of the first and second jigs, thereby reducing the raw materials used to make the first and second jigs and lowering their production costs.

[0012] The side of the first jig is preferably provided with a first inflatable member connected to the first enclosed space, and the first inflatable member only allows the passage of inflatable gas. The side of the second jig is preferably provided with a second inflatable member connected to the second enclosed space, and the second inflatable member only allows the passage of inflatable gas. During exposure, the refractive index matching oil in the first enclosed space (or second enclosed space) cannot leak or diffuse outward through the first inflatable member (or second inflatable member). After exposure is completed, air can be supplied into the first enclosed space (or second enclosed space) through the first inflatable member (or second inflatable member), increasing the internal pressure of the first enclosed space (or second enclosed space), forcing the surface of the oil film in contact with the volume holographic waveguide to bend, thereby achieving mutual separation of the volume holographic waveguide and the prism, facilitating easy disassembly of the exposure structure.

[0013] The first inflatable member preferably includes a first inflatable tube connected to the first enclosed space, which only allows the passage of inflation gas. The second inflatable member preferably includes a second inflatable tube connected to the second enclosed space, which only allows the passage of inflation gas. For a first jig (or second jig) with a smaller thickness, configuring the first inflatable tube (or second inflatable tube) facilitates connection to an external inflation mechanism, thereby supplying air to the first enclosed space (or second enclosed space) during disassembly.

[0014] The first gas-filled tube can be a capillary tube with zero refractive index matching oil flow rate, or a conventional tube through which refractive index matching oil can flow. For the latter, the first gas-filled member further includes a first one-way valve or a first solenoid valve disposed on the first gas-filled tube. Both structures facilitate the separation of the volume holographic waveguide from the prism while preventing leakage or diffusion of the refractive index matching oil. The second gas-filled tube can be a capillary tube with zero refractive index matching oil flow rate, or a conventional tube through which refractive index matching oil can flow. For the latter, the second gas-filled member further includes a second one-way valve or a second solenoid valve disposed on the second gas-filled tube. Both structures facilitate the separation of the volume holographic waveguide from the light-absorbing glass while preventing leakage or diffusion of the refractive index matching oil.

[0015] Secondly, a device for assembling the aforementioned volume holographic waveguide exposure structure is provided. The device includes an oiling mechanism for injecting refractive index matching oil into a first cavity and / or a second cavity, both of which have upward-facing openings. The first cavity is enclosed by a prism and a first fixture, and the second cavity is enclosed by a volume holographic waveguide and a second fixture. This mechanism ensures that the first and second enclosed spaces are precisely filled with refractive index matching oil, quantitatively and even automatically. This ensures that the refractive index matching oil is sufficiently filled to ensure full contact between the volume holographic waveguide, prism, and light-absorbing glass, while also preventing overfilling and resulting in oil waste. Furthermore, the device facilitates rapid and accurate oiling, thereby improving production efficiency.

[0016] The above-mentioned device preferably includes a gripping mechanism configured to grip and move the prism to a designated position, grip and move the first jig onto the prism to form a first cavity, grip and move the volume holographic waveguide onto the first jig to seal the first cavity to form a first enclosed space, grip and move the second jig onto the volume holographic waveguide to form a second cavity, and / or grip and move the light-absorbing glass onto the second jig to seal the second cavity to form a second enclosed space. The gripping mechanism replaces manual labor in the placement of the prism, first jig, volume holographic waveguide, second jig, and light-absorbing glass, facilitating automation of the assembly process and further improving production efficiency.

[0017] In a third aspect, a device for disassembling the volume holographic waveguide exposure structure is provided. The device includes an inflation mechanism configured to inject gas into a first enclosed space via a first inflation member to separate the volume holographic waveguide, the first jig, and the prism from each other, and / or inject gas into a second enclosed space via a second inflation member to separate the volume holographic waveguide, the second jig, and the light-absorbing glass from each other.

[0018] Fourthly, a device for assembling and disassembling the aforementioned volume holographic waveguide exposure structure is provided. The device includes an oiling mechanism and a gas charging mechanism. During assembly, the oiling mechanism is used to inject index-matching oil into a first cavity and / or a second cavity, each opening upward. The first cavity is enclosed by the prism and the first jig, and the second cavity is enclosed by the volume holographic waveguide and the second jig. This ensures that the first and second enclosed spaces are precisely filled with index-matching oil, quantitatively and even automatically. This ensures that the index-matching oil is sufficiently filled to ensure full contact between the volume holographic waveguide, the prism, and the light-absorbing glass, while also preventing overfilling and resulting waste of the oil. This facilitates quick and accurate oiling, improving production efficiency. During disassembly, the gas charging mechanism is used to charge the first enclosed space with gas via the first gas charging member to separate the volume holographic waveguide, the first jig, and the prism, and / or to charge the second enclosed space with gas via the second gas charging member to separate the volume holographic waveguide, the second jig, and the light-absorbing glass.

[0019] The above-mentioned device preferably includes a gripping mechanism. During assembly, the gripping mechanism is used to grip and move the prism to a designated position, grip and move the first jig onto the prism to form a first cavity, grip and move the volume holographic waveguide onto the first jig to seal the first cavity to form a first enclosed space, grip and move the second jig onto the volume holographic waveguide to form a second cavity, and / or grip and move the light-absorbing glass onto the second jig to seal the second cavity to form a second enclosed space. During disassembly, the gripping mechanism is used to grip and move the light-absorbing glass, second jig, and volume holographic waveguide to a position away from the prism after the volume holographic waveguide, first jig, and prism are separated from each other and before the volume holographic waveguide, second jig, and light-absorbing glass are separated from each other. The gripping mechanism replaces manual labor in performing the placement and handling of the prism, first jig, volume holographic waveguide, second jig, and light-absorbing glass, facilitating automation of the assembly and disassembly processes and further improving production efficiency.

[0020] Compared with the existing technology, this solution has the following beneficial effects: This solution uses innovative fixture design to precisely control the thickness and diffusion area of ​​the refractive index matching oil, which not only ensures the performance and stability of the volume holographic waveguide, but also helps to simplify the operation process and improve production efficiency, providing strong support for the widespread application of optical waveguide technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate the present invention, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0022] Figure 1 It is a three-dimensional diagram of the volume holographic waveguide exposure structure.

[0023] Figure 2 This is an exploded view of the volume holographic waveguide exposure structure.

[0024] Figure 3 It is a cross-sectional view of the volume holographic waveguide exposure structure.

[0025] Figure 4 It is a schematic structural diagram of an apparatus for assembling a holographic optical waveguide exposure structure.

[0026] Figure 5 It is a schematic structural diagram of a device for disassembling a volume holographic optical waveguide exposure structure.

[0027] Figure 6 It is a schematic diagram of the structure of the device for assembling and disassembling the volume holographic optical waveguide exposure structure.

[0028] Explanation of the accompanying drawings: exposure structure 100, volume holographic waveguide 110, first surface 111, second surface 112, prism 120, light-absorbing glass 130, jig 140, first jig 141, first inflation tube 1411, second jig 142, second inflation tube 1421, first enclosed space 101, second enclosed space 102, oiling mechanism 200, gripping mechanism 300, inflation mechanism 400, guiding mechanism 500. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present solution, the present solution is further described in detail below with reference to specific embodiments.

[0030] Figures 1 to 3 The volume holographic waveguide exposure structure is shown. The exposure structure 100 is configured with a volume holographic waveguide 110, a prism 120, a light-absorbing glass 130 and a jig 140. It is used in the exposure process of the volume holographic waveguide 110 and will be disassembled after the exposure is completed.

[0031] The volume holographic waveguide 110 has a first surface 111 and a second surface 112 facing each other. During the exposure process, the volume holographic waveguide 110 is placed between the prism 120 and the light-absorbing glass 130, with the first surface 111 facing downward and the second surface 112 facing upward, so that the prism 120 covers the first surface 111 of the volume holographic waveguide 110 and the light-absorbing glass 130 covers the second surface 112 of the volume holographic waveguide 110.

[0032] The fixture 140 may be configured with a first fixture 141, a second fixture 142, or both the first fixture 141 and the second fixture 142 (e.g., Figures 2-3 The first fixture 141 is disposed between the prism 120 and the volume holographic waveguide 110 , and the second fixture 142 is disposed between the light-absorbing glass 130 and the volume holographic waveguide 110 .

[0033] A first through-hole is provided in the center of the first fixture 141. One end of the through-hole connects to the first surface 111 of the volume holographic waveguide 110, and the other end connects to the surface of the prism 120 facing the volume holographic waveguide 110. The volume holographic waveguide 110, the first fixture 141, and the prism 120 together form a first enclosed space 101, which is filled with refractive index matching oil. Therefore, the volume of the first enclosed space 101 limits the amount of refractive index matching oil used, the cross-sectional size of the first through-hole limits the diffusion area of ​​the refractive index matching oil, and the thickness of the first fixture 141 limits the thickness of the refractive index matching oil. This allows for precise control of the thickness and diffusion area of ​​the refractive index matching oil between the volume holographic waveguide 110 and the prism 120.

[0034] A second through-hole is provided in the center of the second jig 142. One end of the second through-hole connects to the second surface 112 of the volume holographic waveguide 110, and the other end connects to the surface of the light-absorbing glass 130 facing the volume holographic waveguide 110. The volume holographic waveguide 110, the second jig 142, and the light-absorbing glass 130 together form a second enclosed space 102, which is filled with refractive index matching oil. Therefore, the volume of the second enclosed space 102 limits the amount of refractive index matching oil used, the cross-sectional size of the second through-hole limits the diffusion area of ​​the refractive index matching oil, and the thickness of the first jig 141 limits the thickness of the refractive index matching oil. This allows for precise control of the thickness and diffusion area of ​​the refractive index matching oil between the volume holographic waveguide 110 and the light-absorbing glass 130.

[0035] Precise control of the index-matching oil thickness and diffusion area by jig 140 is crucial for ensuring the performance of the optical waveguide, as it effectively reduces light reflection losses at the interfaces between the waveguide, prism 120, and light-absorbing glass 130, thereby improving light transmission efficiency. The introduction of jig 140 not only provides a stable carrying space for the index-matching oil but also, by enclosing the first and second enclosed spaces 101, 102, effectively prevents leakage or diffusion of the oil during exposure. This enclosed design ensures a stable exposure process. The fixed volume of the first and second enclosed spaces 101, 102 allows for precise control of the amount of index-matching oil filled, facilitating easy and rapid filling of the oil, thereby improving production efficiency. Due to the closed nature of the second closed space 102, the adsorption between the volume holographic waveguide 110 and the light-absorbing glass 130 is sufficiently strong before the volume holographic waveguide 110 is intentionally separated from the light-absorbing glass 130 by any means. After the exposure is completed, the light-absorbing glass 130 can be grasped and transferred to another location together with the volume holographic waveguide 110. In this process, there is no need to worry about the volume holographic waveguide 110 being separated from the light-absorbing glass 130 and falling and being damaged during the transfer process. The grasping action can also be prevented from directly acting on the volume holographic waveguide 110, which is beneficial to avoid damage to the volume holographic waveguide 110.

[0036] Both the first jig 141 and the second jig 142 can be configured as a frame structure, with their inner walls defining the aforementioned first and second through-holes, respectively. The frame structure design facilitates minimizing the volume of the first jig 141 and the second jig 142, thereby reducing the raw materials used to manufacture the first jig 141 and the second jig 142 and lowering the production cost of the first jig 141 and the second jig 142. The inner and outer contours of the frame structure are similar, specifically, similar to the contour of the volume holographic waveguide 110. This similar shape design facilitates maximizing the contact area between the volume holographic waveguide 110 and the prism 120 and the refractive index matching oil. This also maximizes the contact area between the volume holographic waveguide 110 and the light-absorbing glass 130 and the refractive index matching oil. This allows the dual beams to cover a wider range within the volume holographic waveguide 110, enabling the formation of grating structures at most locations within the volume holographic waveguide 110.

[0037] A first inflatable member connected to the first enclosed space 101 can be configured on the side of the first jig 141. This first inflatable member allows only the passage of inflatable gas. During exposure, the index-matching oil in the first enclosed space 101 cannot leak or diffuse outward through this first inflatable member. After exposure is completed, air can be supplied into the first enclosed space 101 through this first inflatable member, increasing the pressure within the first enclosed space 101 and forcing the surface of the oil film (formed by the index-matching oil filling the first enclosed space 101) in contact with the volume holographic waveguide 110 to bend, thereby separating the volume holographic waveguide 110 from the prism 120 and facilitating easy disassembly of the exposure structure 100.

[0038] Similarly, a second inflatable member connected to the second enclosed space 102 can also be configured on the side of the second fixture 142. This second inflatable member allows only the passage of inflatable gas. During exposure, the index-matching oil in the second enclosed space 102 cannot leak or diffuse outward through this second inflatable member. After exposure is completed, air can be supplied to the second enclosed space 102 through this second inflatable member, increasing the pressure within the second enclosed space 102 and forcing the surface of the oil film (formed by the index-matching oil filling the second enclosed space 102) in contact with the volume holographic waveguide 110 to bend, thereby achieving separation of the volume holographic waveguide 110 and the prism 120, facilitating easy disassembly of the exposure structure 100.

[0039] Specifically, the first inflatable member can be configured as a first inflatable tube 1411. For a first jig 141 with a relatively small thickness, this configuration facilitates easier connection to an external inflatable mechanism 400, thereby supplying air to the first enclosed space 101 during disassembly. The first inflatable tube 1411 can be configured as a capillary tube, allowing external air to enter the first enclosed space 101 under pressure. However, the adhesion between the index matching oil in the first enclosed space 101 and the capillary tube is less than the cohesive force of the oil itself, preventing it from passing through the capillary tube. This means that the index matching oil has a zero permeability. Alternatively, the first inflatable tube 1411 can be configured as a conventional tube equipped with a first one-way valve or a first solenoid valve. This first one-way valve or solenoid valve can be closed before exposure is complete to prevent the index matching oil from passing through, and opened during inflation to allow external air to pass through. Both of these configurations facilitate the separation of the volume holographic waveguide 110 and the prism 120 while preventing leakage or diffusion of the index matching oil.

[0040] Similarly, the second inflatable member can be configured as a second inflatable tube 1421. For the thinner second jig 142, this configuration facilitates easier connection to the external inflatable mechanism 400, thereby supplying air to the second enclosed space 102 during disassembly. The second inflatable tube 1421 can be configured as a capillary tube. External air can enter the second enclosed space 102 through the capillary tube under pressure. However, the adhesion between the refractive index matching oil in the second enclosed space 102 and the capillary tube is less than the cohesive force of the refractive index matching oil itself, preventing it from passing through the capillary tube. Thus, the refractive index matching oil has a zero permeability. The second inflatable tube 1421 can also be configured as a conventional tube equipped with a second one-way valve or a second solenoid valve. This second one-way valve or solenoid valve can be closed before exposure is complete to prevent the refractive index matching oil from passing through, and opened during inflation to allow external air to pass through. Both of these structures facilitate the separation of the volume holographic waveguide 110 from the light-absorbing glass 130 while preventing leakage or diffusion of the refractive index matching oil.

[0041] During the assembly of the volume holographic waveguide exposure structure 100, the first jig 141, the volume holographic waveguide 110, the second jig 142, and the light-absorbing glass 130 are sequentially placed on the prism 120. First, the first jig 141 is placed on the prism 120. The prism 120 and the first jig 141 together form a first cavity with an upward opening. Refractive index matching oil can then be injected into the first cavity. The volume holographic waveguide 110 is then placed on top, forming a first enclosed space 101 filled with refractive index matching oil. Second, the second jig 142 is placed on the volume holographic waveguide 110. The volume holographic waveguide 110 and the second jig 142 together form a second cavity with an upward opening. Refractive index matching oil can then be injected into the second cavity. The light-absorbing glass 130 is then placed on top, forming a second enclosed space 102 filled with refractive index matching oil.

[0042] Figure 4 The apparatus for assembling the volume holographic waveguide exposure structure is illustrated. The apparatus is equipped with an oiling mechanism 200, which can inject index-matching oil into the first and second cavities, both of which have upward openings, to quantitatively and even automatically fill the first and second enclosed spaces 101, 102 with the index-matching oil. This ensures sufficient index-matching oil to ensure full contact between the volume holographic waveguide 110, prism 120, and light-absorbing glass 130, while also preventing overfilling and resulting in oil waste. This mechanism also facilitates rapid and accurate oiling, improving production efficiency.

[0043] The above-mentioned apparatus may also be equipped with a gripping mechanism 300. The gripping mechanism 300 can grip and move the prism 120 to a specified position, grip and move the first jig 141 onto the prism 120 to form a first cavity, grip and move the volume holographic waveguide 110 onto the first jig 141 to seal the first cavity to form a first enclosed space 101, grip and move the second jig 142 onto the volume holographic waveguide 110 to form a second cavity, and grip and move the light-absorbing glass 130 onto the second jig 142 to seal the second cavity to form a second enclosed space 102. The gripping mechanism 300 replaces manual labor in the placement of the prism 120, first jig 141, volume holographic waveguide 110, second jig 142, and light-absorbing glass 130, facilitating automation of the assembly process and further improving production efficiency.

[0044] The above device can also be equipped with a guide mechanism 500, and the oiling mechanism 200 and the grabbing mechanism 300 can be slidably connected to the guide mechanism 500 to achieve back and forth movement of the grabbing mechanism 300 and alternating operation of the oiling mechanism 200 and the grabbing mechanism 300.

[0045] After exposure is completed, the volume holographic waveguide exposure structure 100 needs to be disassembled to obtain a separate volume holographic waveguide 110. During the disassembly of the volume holographic waveguide exposure structure 100, the prism 120, the first jig 141 and the volume holographic waveguide 110, and the volume holographic waveguide 110, the second jig 142 and the light-absorbing glass 130 are sequentially disassembled. First, the first enclosed space 101 is filled with gas to separate the prism 120, the first fixture 141, and the volume holographic waveguide 110, thereby releasing the prism 120 and the first fixture 141. Secondly, the volume holographic waveguide 110, the second fixture 142, and the light-absorbing glass 130 are moved as a whole to a position away from the prism 120. Finally, the second enclosed space 102 is filled with gas to separate the volume holographic waveguide 110, the second fixture 142, and the light-absorbing glass 130, thereby releasing the volume holographic waveguide 110, the second fixture 142, and the light-absorbing glass 130.

[0046] Figure 5 The apparatus for disassembling the volume holographic waveguide exposure structure is shown. The apparatus includes an inflation mechanism 400. The inflation mechanism 400 can use a first inflation member to inject gas into the first enclosed space 101 to separate the volume holographic waveguide 110, the first jig 141, and the prism 120. It can also use a second inflation member to inject gas into the second enclosed space 102 to separate the volume holographic waveguide 110, the second jig 142, and the light-absorbing glass 130.

[0047] Figure 6 The apparatus for assembling and disassembling the volume holographic waveguide exposure structure is illustrated. The apparatus is equipped with an oiling mechanism 200 and an air charging mechanism 400. During assembly, the oiling mechanism 200 can inject index-matching oil into the upwardly opening first and second cavities, ensuring that the first and second enclosed spaces 101, 102 are precisely filled with the index-matching oil in a quantitative or even automatic manner. This ensures that the index-matching oil is adequately filled to ensure full contact between the volume holographic waveguide 110, prism 120, and light-absorbing glass 130, while also preventing overfilling and resulting in oil waste. This facilitates rapid and accurate oiling, improving production efficiency. During the disassembly process, the inflation mechanism 400 can inflate gas into the first enclosed space 101 through the first inflation member to separate the volume holographic waveguide 110, the first fixture 141 and the prism 120 from each other, and can also inflate gas into the second enclosed space 102 through the second inflation member to separate the volume holographic waveguide 110, the second fixture 142 and the light-absorbing glass 130 from each other.

[0048] The above-mentioned device can also be equipped with a gripping mechanism 300. During the assembly process, the gripping mechanism 300 can grip and move the prism 120 to a specified position, grip and move the first jig 141 onto the prism 120 to form a first cavity, grip and move the volume holographic waveguide 110 onto the first jig 141 to seal the first cavity to form a first closed space 101, grip and move the second jig 142 onto the volume holographic waveguide 110 to form a second cavity, and grip and move the light-absorbing glass 130 onto the second jig 142 to seal the second cavity to form a second closed space 102. During the disassembly process, after the volume holographic waveguide 110, the first jig 141, and the prism 120 are separated from each other, and before the volume holographic waveguide 110, the second jig 142, and the light-absorbing glass 130 are separated from each other, the gripping mechanism 300 can grip and move the light-absorbing glass 130, the second jig 142, and the volume holographic waveguide 110 to a position away from the prism 120. This position away from the prism 120 can be equipped with a cleaning mechanism (not shown) to clean and store the light-absorbing glass 130, the second jig 142, and the volume holographic waveguide 110. The gripping mechanism 300 replaces manual labor in the handling and placement of the prism 120, the first jig 141, the volume holographic waveguide 110, the second jig 142, and the light-absorbing glass 130, facilitating the automation of the assembly and disassembly processes and further improving production efficiency.

[0049] The above device can also be equipped with a guide mechanism 500, and the oiling mechanism 200 and the grabbing mechanism 300 can be slidably connected to the guide mechanism 500 to achieve back and forth movement of the grabbing mechanism 300 and alternating operation of the oiling mechanism 200 and the grabbing mechanism 300.

[0050] Obviously, the above embodiments of this solution are merely examples for the purpose of clarifying this solution and are not intended to limit the implementation of this solution. Those skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this solution shall be included within the scope of protection of the claims of this solution.

Claims

1. A volume holographic optical waveguide exposure structure, characterized in that: The exposure structure includes a volume holographic waveguide, a prism, a light-absorbing glass, and a jig, wherein the jig includes a first jig and / or a second jig. The volume holographic waveguide has a first surface and a second surface opposite to each other, the prism covers the first surface of the volume holographic waveguide, and the light-absorbing glass covers the second surface of the volume holographic waveguide. The first jig is arranged between the prism and the volume holographic waveguide, and the second jig is arranged between the light-absorbing glass and the volume holographic waveguide. A first through hole is provided in the center of the first jig, one end of the first through hole is connected to the surface of the volume holographic waveguide, and the other end is connected to the surface of the prism. The volume holographic waveguide, the first jig, and the prism together form a first closed space, and the first closed space is filled with refractive index matching oil. A second through hole is provided in the center of the second jig, one end of the second through hole is connected to the surface of the volume holographic waveguide, and the other end is connected to the surface of the light-absorbing glass. The volume holographic waveguide, the second jig, and the light-absorbing glass together form a second closed space, and the second closed space is filled with refractive index matching oil.

2. The volume holographic optical waveguide exposure structure according to claim 1, characterized in that: The first fixture is configured as a frame structure, and its inner wall forms the first through hole; the second fixture is configured as a frame structure, and its inner wall forms the second through hole.

3. The volume holographic optical waveguide exposure structure according to claim 1, wherein: The side of the first fixture is provided with a first inflatable component connected to the first closed space, and the first inflatable component is only for the passage of inflation gas; the side of the second fixture is provided with a second inflatable component connected to the second closed space, and the second inflatable component is only for the passage of inflation gas.

4. The volume holographic optical waveguide exposure structure according to claim 3, characterized in that: The first inflatable component includes a first inflatable tube connected to the first closed space, and the first inflatable tube is only for the passage of inflatable gas; the second inflatable component includes a second inflatable tube connected to the second closed space, and the second inflatable tube is only for the passage of inflatable gas.

5. The volume holographic optical waveguide exposure structure according to claim 4, characterized in that: The first inflatable tube is a capillary tube with a refractive index matching oil pass rate of zero, or the first inflatable component also includes a first one-way valve or a first solenoid valve arranged on the first inflatable tube; the second inflatable tube is a capillary tube with a refractive index matching oil pass rate of zero, or the second inflatable component also includes a second one-way valve or a second solenoid valve arranged on the second inflatable tube.

6. A device for assembling the volume holographic optical waveguide exposure structure according to any one of claims 1 to 5, characterized in that: The device includes an oil injection mechanism, which is used to inject refractive index matching oil into a first cavity and / or a second cavity with an upward opening, wherein the first cavity is formed by enclosing a prism and a first fixture, and the second cavity is formed by enclosing a volume holographic optical waveguide and a second fixture.

7. The device for exposing a structure of an assembled holographic optical waveguide according to claim 6, characterized in that: The device also includes a gripping mechanism, which is used to grip and move the prism to a specified position, grip and move the first jig onto the prism to form the first cavity, grip and move the volume holographic waveguide onto the first jig to close the first cavity to form the first closed space, grip and move the second jig onto the volume holographic waveguide to form the second cavity, and / or grip and move the light-absorbing glass onto the second jig to close the second cavity to form the second closed space.

8. A device for disassembling the volume holographic optical waveguide exposure structure according to any one of claims 3 to 5, characterized in that: The device includes an inflation mechanism, which is used to inflate gas into a first enclosed space through a first inflation member to separate the volume holographic waveguide, the first fixture and the prism from each other, and / or to inflate gas into a second enclosed space through a second inflation member to separate the volume holographic waveguide, the second fixture and the light-absorbing glass from each other.

9. A device for assembling and disassembling the volume holographic optical waveguide exposure structure according to any one of claims 3 to 5, characterized in that: The device includes an oil injection mechanism and an air filling mechanism; the oil injection mechanism is used to inject refractive index matching oil into a first cavity and / or a second cavity with an upward opening during the assembly process, the first cavity being enclosed by a prism and a first fixture, and the second cavity being enclosed by a volume holographic optical waveguide and a second fixture; the air filling mechanism is used to inject gas into the first enclosed space through the first air filling member to separate the volume holographic optical waveguide, the first fixture, and the prism from each other, and / or to inject gas into the second enclosed space through the second air filling member to separate the volume holographic optical waveguide, the second fixture, and the light-absorbing glass from each other during the disassembly process.

10. The device for assembling and disassembling a volume holographic optical waveguide exposure structure according to claim 9, characterized in that: The device also includes a gripping mechanism; during the assembly process, the gripping mechanism is used to grip the movable prism to a specified position, grip the movable first jig onto the prism to form the first cavity, grip the movable volume holographic waveguide onto the first jig to seal the first cavity to form the first closed space, grip the movable second jig onto the volume holographic waveguide to form the second cavity, and / or grip the movable light-absorbing glass onto the second jig to seal the second cavity to form the second closed space; during the disassembly process, the gripping mechanism is used to grip the movable light-absorbing glass, the second jig, and the volume holographic waveguide to a position away from the prism after the volume holographic waveguide, the first jig, and the prism are peeled off from each other and before the volume holographic waveguide, the second jig, and the light-absorbing glass are peeled off from each other.

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