Optical-mechanical system and near-to-eye display equipment

Abstract

The utility model provides an optical-mechanical system and near-to-eye display equipment, and relates to the technical field of near-to-eye display. The optical-mechanical system comprises a prism system, an illumination system and an imaging system, the prism system comprises a first shell and an image source arranged on the first shell, the illumination system comprises a second shell and a light source arranged on the second shell, and the imaging system comprises a third shell and an imaging lens group arranged in the third shell. The second shell and the third shell are respectively connected with the first shell; illuminating light output by the light source irradiates the image source to generate image light, and the image light forms an image on an imaging surface after passing through the imaging lens group. The subsystems in the optical-mechanical system are respectively independent and are connected through respective shells, each subsystem can be independently processed and assembled, the optical-mechanical system has the advantages of low processing difficulty, high processing precision, modular management and control in production, high yield of finished products, convenience in mass production and assembly and the like, independent performance detection can be carried out on each subsystem, and the production efficiency of the optical-mechanical system is improved. Respectively monitoring or replacing.

Description

Technical Field

[0001] This application relates to the field of near-eye display technology, and more specifically, to an optomechanical system and a near-eye display device. Background Technology

[0002] Near-eye displays are devices used in augmented reality (AR) and virtual reality (VR) technologies. Their main function is to present virtual images or augmented reality scenes in front of the user's eyes through miniature display panels and imaging optics. Near-eye displays are typically worn in front of the user's eyes and project images onto the user's retina through an optomechanical system, thereby providing the user with an immersive visual experience.

[0003] The optomechanical system of near-eye display devices mainly includes a prism assembly, an illumination assembly, and an imaging assembly. The illumination light output from the illumination assembly shines on the image source of the prism assembly to generate image light, which is then emitted by the imaging assembly to form an image. However, in existing optomechanical systems, the prism assembly, illumination assembly, and imaging assembly are all fixed in the same housing, which makes the manufacturing process difficult and assembly challenging. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of the prior art by providing an optomechanical system and a near-eye display device that are easy to manufacture and assemble.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In one aspect of this application, an optomechanical system is provided, comprising: a prism system, an illumination system, and an imaging system. The prism system includes a first housing and an image source disposed on the first housing. The illumination system includes a second housing and a light source disposed on the second housing. The imaging system includes a third housing and an imaging lens group disposed within the third housing. The second housing and the third housing are respectively connected to the first housing. Illumination light output from the light source illuminates the image source to generate image light, and the image light forms an image on the imaging surface after passing through the imaging lens group.

[0007] Optionally, one of the first housing and the second housing is provided with a first adhesive groove, the first adhesive groove exposes the surfaces of the first housing and the second housing, and the first adhesive groove is filled with adhesive to bond the first housing and the second housing; one of the first housing and the third housing is provided with a second adhesive groove, the second adhesive groove exposes the surfaces of the first housing and the third housing, and the second adhesive groove is filled with adhesive to bond the first housing and the third housing.

[0008] Optionally, one of the first housing and the second housing is provided with a positioning post, and the other is provided with a first positioning hole, with the positioning post inserted into the first positioning hole.

[0009] Optionally, the end face of the first housing is provided with a second positioning hole, the third housing is inserted into the second positioning hole and fits against the inner wall of the second positioning hole, and the second glue groove includes an annular part and a glue injection part communicating with the annular part. The annular part is located on the end face of the first housing and surrounds the side of the third housing, and the glue injection part is located on the side of the first housing and exposes the side of the third housing.

[0010] Optionally, the number of injection portions is at least two, and the at least two injection portions are distributed at intervals around the side of the third housing.

[0011] Optionally, the lighting system further includes a first adjusting mirror assembly disposed within a second housing. The end face of the second housing is provided with a first mounting groove, and the first adjusting mirror assembly is inserted into the first mounting groove from the end face of the second housing. The end face of the third housing is provided with a second mounting groove, and the imaging mirror assembly is inserted into the second mounting groove from the end face of the third housing.

[0012] Optionally, the second housing includes a first cylindrical portion and a first end cap, a first mounting groove is located inside the first cylindrical portion, one end face of the first cylindrical portion is connected to the first housing, and the opposite end face is connected to the first end cap, and the light source is clamped and fixed between the first cylindrical portion and the first end cap; the third housing includes a second cylindrical portion and a second end cap, a second mounting groove is located inside the second cylindrical portion, the end face of the second cylindrical portion away from the first housing is connected to the second end cap, and the second end cap is provided with a light-emitting hole.

[0013] Optionally, the second housing is provided with a third adhesive groove communicating with the first mounting groove. The third adhesive groove exposes the inner wall of the second housing and the side surface of the lens in the first adjusting lens assembly. The third adhesive groove is filled with adhesive to bond the lens in the first adjusting lens assembly and the second housing. The third housing is provided with a fourth adhesive groove communicating with the second mounting groove. The fourth adhesive groove exposes the inner wall of the third housing and the side surface of the lens in the imaging lens assembly. The fourth adhesive groove is filled with adhesive to bond the lens in the imaging lens assembly and the third housing.

[0014] Optionally, the prism system further includes a second adjustment mirror group disposed on the first housing. The second adjustment mirror group includes a deflection prism and a polarizing beam splitter prism. The light source and the polarizing beam splitter prism are located on the same side of the deflection prism. The image source and the imaging mirror group are located on opposite sides of the polarizing beam splitter prism. The illumination light is deflected for the first time by the deflection prism and then deflected again by the polarizing beam splitter prism before illuminating the image source to generate image light. The image light is emitted and imaged through the polarizing beam splitter prism and the imaging mirror group.

[0015] In another aspect of the embodiments of this application, a near-eye display device is provided, including the optomechanical system as described in any of the above.

[0016] The beneficial effects of this application include:

[0017] This application provides an optomechanical system, including a prism system, an illumination system, and an imaging system. The prism system includes a first housing and an image source disposed on the first housing. The illumination system includes a second housing and a light source disposed on the second housing. The imaging system includes a third housing and an imaging lens group disposed within the third housing. The second and third housings are respectively connected to the first housing. Illumination light output from the light source illuminates the image source to generate image light, which then forms an image on the imaging surface after passing through the imaging lens group. In this optomechanical system, the prism system, illumination system, and imaging system are independent and connected through their respective housings. Each subsystem can be processed and assembled independently. Therefore, this optomechanical system has advantages such as low processing difficulty, high processing precision, modular control during production, high yield, and ease of mass production and assembly. Furthermore, each subsystem can be independently tested, monitored, or replaced. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of the optomechanical system provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the prism system in the optomechanical system provided in the embodiments of this application;

[0021] Figure 3 This is a second schematic diagram of the structure of the optomechanical system provided in the embodiments of this application;

[0022] Figure 4 A cross-sectional view of the optomechanical system provided in an embodiment of this application;

[0023] Figure 5 This is a cross-sectional view of the prism system in the optomechanical system provided in the embodiments of this application.

[0024] Icons: 10-Optical-mechanical system; 11-Prism system; 111-First housing; 1111-Second dispensing groove; 1111a-Annular part; 1111b-Dispensing part; 1112-Positioning post; 1113-Second positioning hole; 112-Image source; 113-Conversion prism; 1131-Reflecting surface; 114-Polarizing beam splitter; 1141-First triangular prism; 1141a-Incident surface; 1141b-Transmitting surface; 1141c-First beam splitting surface; 1142-Second triangular prism; 1142a-Outcrystallization surface 1142b - Second beam-splitting surface; 1142c - Light-absorbing surface; 12 - Illumination system; 121 - Second housing; 121a - First cylindrical part; 121b - First end cap; 1211 - First adhesive groove; 1212 - First mounting groove; 122 - Light source; 1221 - Power connection structure; 123 - First adjustment lens group; 13 - Imaging system; 131 - Third housing; 131a - Second cylindrical part; 131b - Second end cap; 1311 - Second mounting groove; 1312 - Light exit hole; 132 - Imaging lens group. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Regarding one aspect of the embodiments of this application, please refer to Figure 1 and Figure 2 An optical-mechanical system 10 is provided, comprising: a prism system 11, an illumination system 12, and an imaging system 13. The prism system 11 includes a first housing 111 and an image source 112 disposed on the first housing 111. The illumination system 12 includes a second housing 121 and a light source 122 disposed on the second housing 121. The imaging system 13 includes a third housing 131 and an imaging lens group 132 disposed within the third housing 131. The second housing 121 and the third housing 131 are respectively connected to the first housing 111.

[0031] The light source 122 can be an illumination source such as a light-emitting diode or a laser light source, used to output illumination light. The image source 112 can be a reflective projection chip such as a liquid crystal display, a digital light processing chip, or a light-emitting diode image source, used to receive the illumination light and modulate it into image light before outputting it. The illumination light output from the light source 122 illuminates the image source 112 to generate image light, and the image light passes through the imaging lens group 132 to form an image on the imaging surface for human observation.

[0032] The prism system 11, illumination system 12 and imaging system 13 in the aforementioned optomechanical system 10 are independent and connected through their respective housings. Each subsystem can be processed and assembled separately. Therefore, the optomechanical system 10 has the advantages of low processing difficulty, high processing accuracy, modular control in production, high yield of finished products, and ease of mass production and assembly. At the same time, each subsystem can be independently tested, monitored or replaced separately.

[0033] Alternatively, please refer to Figure 1 and Figure 3 One of the first housing 111 and the second housing 121 is provided with a first adhesive groove 1211. The first adhesive groove 1211 exposes the surfaces of the first housing 111 and the second housing 121. The first adhesive groove 1211 is filled with adhesive. After the adhesive cures, the surfaces of the first housing 111 and the second housing 121 exposed by the first adhesive groove 1211 are bonded together, thereby realizing the connection between the first housing 111 and the second housing 121.

[0034] One of the first housing 111 and the third housing 131 is provided with a second adhesive groove 1111. The second adhesive groove 1111 exposes the surfaces of the first housing 111 and the third housing 131. The second adhesive groove 1111 is filled with adhesive. After the adhesive cures, the surfaces of the first housing 111 and the third housing 131 exposed by the second adhesive groove 1111 are bonded together, thereby realizing the connection between the first housing 111 and the third housing 131.

[0035] When it is necessary to replace the lighting system 12, imaging system 13, or prism system 11, the two connected subsystems can be separated simply by dissolving the cured adhesive.

[0036] Optionally, a first dispensing groove 1211 is disposed on the end face of the second housing 121, which abuts against the end face of the first housing 111. The first dispensing groove 1211 is a strip-shaped groove, with both ends extending to the side of the second housing 121, and the first dispensing groove 1211 forming an opening on the side of the second housing 121. This facilitates dispensing and makes the connection between the first housing 111 and the second housing 121 more secure.

[0037] Furthermore, the second housing 121 has two opposing sides, and the number of first adhesive grooves 1211 is two, with the two first adhesive grooves 1211 located on the two opposing sides respectively.

[0038] In order to position the first housing 111 and the second housing 121 before dispensing, optionally, one of the first housing 111 and the second housing 121 is provided with a positioning post 1112 and the other is provided with a first positioning hole, with the positioning post 1112 inserted into the first positioning hole.

[0039] After the positioning pin 1112 mates with the first positioning hole, the end faces of the first housing 111 and the second housing 121 are in contact with each other, and the first housing 111 and the second housing 121 cannot rotate relative to each other. Applying adhesive after positioning can improve the accuracy of the optomechanical system 10.

[0040] To position the first housing 111 and the third housing 131 before adhesive dispensing, optionally, the end face of the first housing 111 is provided with a second positioning hole 1113, and the third housing 131 is inserted into the second positioning hole 1113 and fits against the inner wall of the second positioning hole 1113. After the third housing 131 is inserted into the first housing 111, it can be moved back and forth along the insertion direction for focusing. After focusing is completed, adhesive dispensing can be performed to fix it. Positioning the third housing 131 by inserting it into the first housing 111 facilitates focusing of the imaging system 13.

[0041] The second glue groove 1111 includes an annular portion 1111a and a glue injection portion 1111b communicating with the annular portion 1111a. The annular portion 1111a is located on the end face of the first housing 111 and surrounds the side of the third housing 131. The glue injection portion 1111b is located on the side of the first housing 111 and exposes the side of the third housing 131.

[0042] When machining the second positioning hole 1113, the end of the second positioning hole 1113 can be chamfered to form the annular portion 1111a of the second glue groove 1111.

[0043] The glue injection section 1111b is located on the side of the first housing 111, facilitating glue injection. Glue is injected into the glue injection section 1111b, and the glue flows into the annular section 1111a. The cured glue surrounds the third housing 131, bonding the third housing 131 to the first housing 111, thereby improving the reliability of the connection between the first housing 111 and the third housing 131.

[0044] Furthermore, the number of glue-injecting portions 1111b is at least two, and the at least two glue-injecting portions 1111b are distributed at intervals around the side of the third housing 131. Using at least two glue-injecting portions 1111b for glue injection can improve efficiency and further enhance the reliability of the connection between the first housing 111 and the third housing 131.

[0045] Optionally, there are two glue injection sections 1111b, which are symmetrically arranged with respect to the third housing 131.

[0046] Alternatively, please refer to Figure 4The lighting system 12 also includes a first adjusting mirror assembly 123 disposed within the second housing 121. The end face of the second housing 121 has a first mounting groove 1212, and the first adjusting mirror assembly 123 is inserted into the first mounting groove 1212 from the end face of the second housing 121. The end face of the third housing 131 has a second mounting groove 1311, and the imaging mirror assembly 132 is inserted into the second mounting groove 1311 from the end face of the third housing 131.

[0047] The second housing 121 has two opposing end faces and at least one side face connecting the two end faces. The number of first mounting slots 1212 can be one or two. That is, the second housing 121 can have a first mounting slot 1212 on only one end face, or both end faces can have a first mounting slot 1212, depending on the number and installation position of the lenses in the first adjusting lens assembly 123. If there are two first mounting slots 1212, the two first mounting slots 1212 are interconnected, allowing the illumination light to pass through smoothly. The first mounting slot 1212 can be a stepped slot to accommodate multiple lenses and uses the stepped surface to limit the movement of the lenses.

[0048] The third housing 131 also has two opposing end faces and at least one side connecting the two end faces, and the number of second mounting slots 1311 is one or two. If the number of second mounting slots 1311 is two, the two second mounting slots 1311 are interconnected, thereby allowing image light to pass through smoothly. The second mounting slots 1311 can also be stepped slots.

[0049] The lenses in the lighting system 12 and the imaging system 13 are inserted and installed by the end face of their housings, which makes it easier to control the accuracy of the lighting system 12 and the imaging system 13 and makes the lighting system 12 and the imaging system 13 easier to assemble.

[0050] After the lens is installed, to prevent it from moving in the opposite direction to the installation direction, optionally, the second housing 121 is provided with a third adhesive groove communicating with the first mounting groove 1212. The third adhesive groove exposes the inner wall of the second housing 121 and the side of the lens in the first adjusting lens assembly 123. After the lens of the first adjusting lens assembly 123 is installed in the designated position, adhesive is filled into the third adhesive groove. After the adhesive cures, it bonds the lens in the first adjusting lens assembly 123 to the second housing 121, thereby fixing the lens.

[0051] Similarly, the third housing 131 is provided with a fourth adhesive groove communicating with the second mounting groove 1311. The fourth adhesive groove exposes the inner wall of the third housing 131 and the side of the lens in the imaging lens assembly 132. After the lens of the imaging assembly is installed in the designated position, adhesive is filled into the fourth adhesive groove. After the adhesive cures, it bonds the lens in the imaging lens assembly 132 to the third housing 131, thereby fixing the lens.

[0052] Optionally, please refer to the following: Figure 3 The second housing 121 includes a first cylindrical portion 121a and a first end cap 121b. A first mounting groove 1212 is located inside the first cylindrical portion 121a. The first cylindrical portion 121a is hollow inside and is used to install the first adjusting lens assembly 123. One end face of the first cylindrical portion 121a is connected to the first housing 111, and the opposite end face is connected to the first end cap 121b. The light source 122 is clamped and fixed between the first cylindrical portion 121a and the first end cap 121b.

[0053] The power connection structure 1221 of the light source 122 can extend out of the second housing 121 through the gap between the first cylindrical portion 121a and the first end cap 121b, thereby achieving power connection. The illumination light emitted by the light source 122 is modulated by the first adjusting mirror group 123 and then enters the first housing 111. It can be understood that in order to allow the illumination light to enter the first housing 111 smoothly, the first housing 111 should be provided with an opening corresponding to the first mounting groove 1212 to allow the illumination light to pass through.

[0054] Optionally, the third housing 131 includes a second cylindrical portion 131a and a second end cap 131b. A second mounting groove 1311 is located inside the second cylindrical portion 131a. The second cylindrical portion 131a is hollow inside and is used to mount the imaging lens assembly 132. The end face of the second cylindrical portion 131a away from the first housing 111 is connected to the second end cap 131b. The second end cap 131b is provided with a light exit hole 1312.

[0055] The light exit aperture 1312 corresponds to the position of the imaging lens group 132, so that the image light can be emitted through the light exit aperture 1312. It can be understood that in order for the image light to enter the third housing 131 smoothly, the first housing 111 should be provided with an opening corresponding to the second mounting groove 1311 to allow the image light to pass through.

[0056] The second housing 121 and the third housing 131 are separated into a cylindrical part and an end cap, which facilitates the processing of the mounting groove inside the housing and the installation of the lens. After installation, the end cap can also limit and protect the lens.

[0057] Optionally, the prism system 11 further includes a second adjustment mirror group disposed on the first housing 111. The second adjustment mirror group includes a deflection prism 113 and a polarizing beam splitter prism 114. The light source 122 and the polarizing beam splitter prism 114 are located on the same side of the deflection prism 113. The image source 112 and the imaging mirror group 132 are respectively located on opposite sides of the polarizing beam splitter prism 114. The illumination light is deflected for the first time by the deflection prism 113 and then deflected again by the polarizing beam splitter prism 114 before illuminating the image source 112 to generate image light. The image light is emitted and imaged through the polarizing beam splitter prism 114 and the imaging mirror group 132.

[0058] The second adjustment mirror group folds the optical path. The illumination optical path is first folded by the deflection prism 113 and then folded a second time by the polarizing beam splitter prism 114, so that the illumination light can illuminate the image source 112 to generate image light. Folding the illumination optical path can effectively reduce the size of the optomechanical system 10.

[0059] Alternatively, please refer to Figure 4 and Figure 5 The polarizing beam splitter 114 includes a first triangular prism 1141 and a second triangular prism 1142. The first triangular prism 1141 has an incident surface 1141a, a transmitted surface 1141b, and a first beam splitting surface 1141c. The incident surface 1141a faces the reflecting surface 1131 of the deflection prism 113, and the image source 112 is disposed on one side of the first transmitted surface 1141b. The second triangular prism 1142 includes an exit surface 1142a and a second beam splitting surface 1142b. An imaging lens group 132 is disposed on one side of the exit surface 1142a, and the second beam splitting surface 1142b shares the same plane with the first beam splitting surface 1141c. The incident surface 1141a and the exit surface 1142a are optically polished surfaces. Polarizing films are provided on the first beam-splitting surface 1141c and the second beam-splitting surface 1142b, so that the first triangular prism 1141 and the second triangular prism 1142 can form a polarizing beam-splitting prism 114, thereby achieving polarization beam splitting. That is, when passing through the first beam-splitting surface 1141c and the second beam-splitting surface 1142b, P-polarized light is transmitted and emitted, while S-polarized light is reflected and emitted, or S-polarized light is transmitted and emitted, while P-polarized light is reflected and emitted.

[0060] Optionally, the second triangular prism 1142 also has a light-absorbing surface 1142c, which is connected to the light-emitting surface 1142a and the second beam-splitting surface 1142b respectively. The light-absorbing surface 1142c can be achieved by coating with ink or by coating with other light-absorbing material layers so that light can be absorbed when it reaches the light-absorbing surface 1142c.

[0061] Optionally, the deflecting prism 113 has a reflecting surface 1131, with an angle of 45° between the reflecting surface 1131 and the optical axis of the illumination light emitted from the light source 122. The first beam-splitting surface 1141c and the second beam-splitting surface 1142b are parallel to the reflecting surface 1131 of the deflecting prism 113. The incident surface 1141a and the transmitted surface 1141b of the first triangular prism 1141 are perpendicular to each other, and the angle between them and the first beam-splitting surface 1141c is 45°. The emitting surface 1142a of the second triangular prism 1142 is parallel to the transmitted surface 1141b and the angle between it and the second beam-splitting surface 1142b is 45°. In this way, the size of the optomechanical system 10 can be further reduced.

[0062] This embodiment also provides a near-eye display device, including the optomechanical system 10 as described above.

[0063] This near-eye display device includes the same structure and beneficial effects as the optomechanical system 10 in the foregoing embodiments. The structure and beneficial effects of the optomechanical system 10 have been described in detail in the foregoing embodiments and will not be repeated here.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An optomechanical system, characterized in that, include: The system comprises a prism system, an illumination system, and an imaging system. The prism system includes a first housing and an image source disposed on the first housing. The illumination system includes a second housing and a light source disposed on the second housing. The imaging system includes a third housing and an imaging lens group disposed within the third housing. The second housing and the third housing are respectively connected to the first housing. The illumination light output by the light source illuminates the image source to generate image light. The image light passes through the imaging lens group and forms an image on the imaging surface.

2. The optomechanical system as described in claim 1, characterized in that, One of the first housing and the second housing is provided with a first adhesive groove, the first adhesive groove exposes the surfaces of the first housing and the second housing, and the first adhesive groove is filled with adhesive to bond the first housing and the second housing together. One of the first housing and the third housing is provided with a second adhesive groove, the second adhesive groove exposes the surfaces of the first housing and the third housing, and the second adhesive groove is filled with adhesive to bond the first housing and the third housing together.

3. The optomechanical system as described in claim 2, characterized in that, One of the first housing and the second housing is provided with a positioning post, and the other is provided with a first positioning hole, wherein the positioning post is inserted into the first positioning hole.

4. The optomechanical system as described in claim 2, characterized in that, The first housing has a second positioning hole on its end face. The third housing is inserted into the second positioning hole and fits against the inner wall of the second positioning hole. The second glue groove includes an annular part and a glue injection part communicating with the annular part. The annular part is located on the end face of the first housing and surrounds the side of the third housing. The glue injection part is located on the side of the first housing and exposes the side of the third housing.

5. The optomechanical system as described in claim 4, characterized in that, The number of the glue injection parts is at least two, and the at least two glue injection parts are distributed at intervals around the side of the third housing.

6. The optomechanical system as described in claim 1, characterized in that, The lighting system further includes a first adjusting mirror assembly disposed within the second housing. The end face of the second housing is provided with a first mounting groove, and the first adjusting mirror assembly is inserted into the first mounting groove from the end face of the second housing. The end face of the third housing is provided with a second mounting groove, and the imaging mirror assembly is inserted into the second mounting groove from the end face of the third housing.

7. The optomechanical system as described in claim 6, characterized in that, The second housing includes a first cylindrical portion and a first end cap. The first mounting groove is located inside the first cylindrical portion. One end face of the first cylindrical portion is connected to the first housing, and the opposite end face is connected to the first end cap. The light source is clamped and fixed between the first cylindrical portion and the first end cap. The third housing includes a second cylindrical portion and a second end cap. The second mounting groove is located inside the second cylindrical portion. The end face of the second cylindrical portion away from the first housing is connected to the second end cap. The second end cap is provided with a light-emitting hole.

8. The optomechanical system as described in claim 6, characterized in that, The second housing is provided with a third adhesive groove that communicates with the first mounting groove. The third adhesive groove exposes the inner wall of the second housing and the side of the lens in the first adjustment lens group. The third adhesive groove is filled with adhesive to bond the lens in the first adjustment lens group to the second housing. The third housing has a fourth adhesive groove that communicates with the second mounting groove. The fourth adhesive groove exposes the inner wall of the third housing and the side of the lens in the imaging lens assembly. The fourth adhesive groove is filled with adhesive to bond the lens in the imaging lens assembly to the third housing.

9. The optomechanical system as described in claim 1, characterized in that, The prism system further includes a second adjustment mirror group disposed on the first housing. The second adjustment mirror group includes a deflection prism and a polarizing beam splitter prism. The light source and the polarizing beam splitter prism are located on the same side of the deflection prism. The image source and the imaging mirror group are located on opposite sides of the polarizing beam splitter prism. The illumination light is deflected for the first time by the deflection prism and then deflected again by the polarizing beam splitter prism before illuminating the image source to generate the image light. The image light is emitted and imaged by the polarizing beam splitter prism and the imaging mirror group.

10. A near-eye display device, characterized in that, Includes the optomechanical system as described in any one of claims 1 to 9.

Images