Optical-mechanical focusing structure and assembling method thereof

Abstract

The application discloses an optical-mechanical focusing structure and an assembling method thereof, and the structure comprises an LCOS assembly, an illumination assembly and a lens assembly, the LCOS assembly comprises an LCOS module and an LCOS shell, and the lens assembly comprises a lens module and a lens shell; the illumination assembly emits an illumination light beam, the lens module is located on a transmission path of the illumination light beam, the lens module is used for reflecting the illumination light beam to form a first reflected light beam, the LCOS module is located on a transmission path of the first reflected light beam, the LCOS module is used for reflecting the first reflected light beam to form a second reflected light beam, and the lens module is also located on a transmission path of the second reflected light beam and is used for transmitting the second reflected light beam; the LCOS shell is used for bearing the LCOS module, the lens shell is used for containing the lens module, and the LCOS shell and the lens shell are connected in a plug-in mode. Through the plug-in mode, the adjustment mode is more flexible, and disassembly and maintenance will not damage the LCOS module, thereby avoiding a series of problems caused by PC glue.

Description

Technical Field

[0001] This invention relates to the field of LCOS optical mechanism technology, and in particular to an optical mechanism focusing structure and its assembly method. Background Technology

[0002] The core imaging devices for AR (Augmented Reality) and AI (Artificial Intelligence) are the optical engine and waveguide. The waveguide is the display, and the optical engine is the projector. The manufacturability and performance of the optical engine greatly influence the industry's development. Among them, the core of the LCOS (Liquid Crystal On Silicon) optical engine is a tiny liquid crystal display. This display uses a silicon wafer as a substrate and coats it with a reflective film. Unlike traditional transmissive liquid crystal display technology, LCOS technology uses light emitted from a light source, modulated by the liquid crystal layer, and then projects the pattern through reflection.

[0003] In related technologies, when assembling an LCOS optical engine, a PC (Polycarbonate) adhesive layer is typically placed between the LCOS module and the lens assembly. After the LCOS module is focused, UV (Ultraviolet adhesive) is then applied between the LCOS module and the PC adhesive layer for fixation. However, this method has several problems. Since the PC adhesive layer is an elastomer, the FPC (Flexible Printed Circuit) lines clipped onto the LCOS module can squeeze the adhesive tape, causing the LCOS module to lose focus. Furthermore, the illumination components and other components of the optical engine generate heat, and prolonged exposure to heat can deform the PC adhesive layer, causing a shift in the LCOS module's position and resulting in defocusing. Moreover, if a component of the optical engine needs repair, disassembling the connection between the LCOS module and the PC adhesive layer can easily damage the LCOS module. Additionally, due to dimensional errors in the manufacturing of various components, the gap between the LCOS module and the lens assembly is not a fixed value, requiring the application of different numbers of PC adhesive layers to each optical engine individually. Summary of the Invention

[0004] This invention proposes an optomechanical focusing structure and its assembly method, aiming to solve problems in related technologies.

[0005] Based on this, the present invention proposes an optomechanical focusing structure, comprising: an LCOS component, an illumination component, and a lens component, wherein the LCOS component includes an LCOS module and an LCOS housing, and the lens component includes a lens module and a lens housing; The lighting component emits an illumination beam, the lens module is located on the transmission path of the illumination beam, the lens module is used to reflect the illumination beam to form a first reflected beam, the LCOS module is located on the transmission path of the first reflected beam, the LCOS module is used to reflect the first reflected beam to form a second reflected beam, and the lens module is also located on the transmission path of the second reflected beam to transmit the second reflected beam. The LCOS housing is used to carry the LCOS module, and the lens housing is used to accommodate the lens module. The LCOS housing and the lens housing are connected by a plug-in connection.

[0006] Optionally, the LCOS housing includes a base, a limiting portion, and a plurality of protrusions; the protrusions are protrusions that protrude from a first surface of the base along a first direction, the first direction being the direction in which the second reflected light beam is transmitted; the limiting portion is used to support and limit the LCOS module. The lens housing includes a groove that mates with the protrusion. The groove is formed by recessing from the surface of the lens housing along the first direction. The groove is inserted into the protrusion, and the surface of the lens housing is in contact with the first surface.

[0007] Optionally, each of the protrusions is disposed along the periphery of the base portion, each of the groove portions is disposed along the periphery of the lens housing, and each of the groove portions has a first opening in the circumferential direction of the lens housing.

[0008] Optionally, the limiting portion is a bearing groove extending from the second surface of the base along a second direction, the second direction being the direction in which the first reflected light beam is transmitted; the bearing groove has a second opening along the circumferential direction of the LCOS housing, and in the first direction, the first surface of the base corresponding to the second opening is not provided with the protrusion.

[0009] Optionally, the bottom of the bearing groove is provided with a first light-transmitting perforation, and the surface of the lens housing is provided with a second light-transmitting perforation; The first light-transmitting perforation and the second light-transmitting perforation are fitted together to form a light channel through which the first reflected beam and the second reflected beam pass.

[0010] Optionally, a first picking portion is provided on the wall of the bearing groove. The first picking portion is a recessed portion formed from the groove wall along the second direction, and the picking portion is used to expose part of the LCOS module.

[0011] Optionally, a second picking part is provided at the inner corner of the wall of the bearing groove, and the second picking part is an arc-shaped corner.

[0012] Optionally, the lens housing includes a projection light outlet, and the plane where the second opening is located is parallel to the plane where the projection light outlet is located.

[0013] Optionally, the lighting assembly includes a lighting housing having a first light-transmitting port and a lens housing having a second light-transmitting port, the first light-transmitting port and the second light-transmitting port being fitted together for passing the lighting beam, and the lighting housing and the lens housing being integrally formed.

[0014] Another aspect of the present invention proposes an assembly method for an optomechanical focusing structure, implemented based on the optomechanical focusing structure described in any embodiment of the present invention; the method includes: The robotic arm is controlled to grasp the LCOS module and release the LCOS module into the carrier groove of the LCOS shell to form an LCOS assembly; The robotic arm is controlled to grasp the LCOS component and align the protrusion of the LCOS housing with the groove of the lens housing, so that the protrusion is inserted into the groove. Power on the LCOS component and control the robotic arm to adjust the relative position between the LCOS housing and the lens housing, so that the image emitted by the lens component reaches the preset clarity, and keep the relative position between the protrusion and the groove fixed. The gap between the protrusion and the groove is filled with glue.

[0015] According to embodiments of the present invention, an optomechanical focusing structure and its assembly method are provided. The structure includes an LCOS component, an illumination component, and a lens component. The LCOS component includes an LCOS module and an LCOS housing. The lens component includes a lens module and a lens housing. The illumination component emits an illumination beam. The lens module is located on the transmission path of the illumination beam and is used to reflect the illumination beam to form a first reflected beam. The LCOS module is located on the transmission path of the first reflected beam and is used to reflect the first reflected beam to form a second reflected beam. The lens module is also located on the transmission path of the second reflected beam and is used to transmit the second reflected beam. The LCOS housing is used to support the LCOS module, and the lens housing is used to accommodate the lens module. The LCOS housing and the lens housing are connected by a plug-in connection. The optomechanical focusing structure proposed in this invention, by connecting the LCOS housing and the lens housing using a plug-in connection, provides more flexible adjustment methods. Disassembly and maintenance will not damage the LCOS module, avoiding a series of problems caused by the use of PC adhesive. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the optical-mechanical focusing structure proposed in an embodiment of the present invention; Figure 2 This is a schematic diagram of the first-view structure of the optical-mechanical focusing structure proposed in an embodiment of the present invention; Figure 3 This is a schematic diagram of the second-view structure of the optomechanical focusing structure proposed in the embodiments of the present invention; Figure 4 This is a schematic diagram of the third-view structure of the optical-mechanical focusing structure proposed in the embodiments of the present invention; Figure 5 This is a flowchart of the assembly method of the optomechanical focusing structure proposed in the embodiments of the present invention.

[0017] Figure label: 100. Optical-mechanical focusing structure; 200. LCOS component; 300. Illumination component; 400. Lens component; 201. LCOS module; 202. LCOS housing; 203. First surface; 204. Second surface; 21. Base; 22. Limiting part; 23. Protrusion; 221. Support groove; 222. First light-transmitting perforation; 223. First gripping part; 224. Second gripping part; 24. Groove; 301. Illumination source; 302. Illumination housing; 401. Lens module; 402. Lens housing; 403. Lens housing surface; 404. Second light-transmitting perforation; 405. Projection light outlet. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the invention and not all structures. Various modifications and variations can be made to the present invention without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, the present invention is intended to cover modifications and variations falling within the scope of the corresponding claims and their equivalents. It should be noted that the embodiments provided in the present invention can be combined with each other without contradiction.

[0019] Figure 1 This is a schematic diagram of the optical-mechanical focusing structure proposed in an embodiment of the present invention. Figure 1 As shown, the optical-mechanical focusing structure 100 includes: an LCOS component 200, an illumination component 300, and a lens component 400. The LCOS component 200 includes an LCOS module 201 and an LCOS housing 202, and the lens component 400 includes a lens module 401 and a lens housing 402. The illumination assembly 300 emits an illumination beam L1. The lens module 401 is located on the transmission path of the illumination beam L1 and is used to reflect the illumination beam L1 to form a first reflected beam L2. The LCOS module 201 is located on the transmission path of the first reflected beam L2 and is used to reflect the first reflected beam L2 to form a second reflected beam L3. The lens module 401 is also located on the transmission path of the second reflected beam L3 and is used to transmit the second reflected beam L3. The LCOS housing 202 is used to carry the LCOS module 201, and the lens housing 402 is used to accommodate the lens module 401. The LCOS housing 202 and the lens housing 402 are connected by a plug-in connection.

[0020] The illumination component 300 can be an LED light source. In one embodiment, the LED light source can emit a linearly polarized beam, i.e., the illumination beam L1 is a linearly polarized beam. The lens module 401 can be a polarizing beam splitter and a light-emitting lens group. The illumination beam L1 is reflected by the polarizing beam splitter to form a first reflected beam L2. The first reflected beam L2 enters the LCOS module 201 and is modulated by the LCOS module 201 to form a linearly polarized light, i.e., a second reflected beam L3, with a polarization state different from that of the illumination beam L1. The second reflected beam L3 is transmitted by the polarizing beam splitter. In one embodiment, the second reflected beam L3 can be emitted directly, or its emission direction can be changed by adding a reflector. For example, Figure 1 As shown, the second reflected beam L3 is reflected and then emitted again.

[0021] The lens housing 402 in the lens assembly 400 may be provided with gaskets or the like to fit the lens module 401, so that the lens module 401 can be supported.

[0022] The LCOS housing 202 and the lens housing 402 are connected by a plug-in fit. In one embodiment, the contact portion between the LCOS housing 202 and the lens housing 402 may have a groove, and the lens housing 402 may have a protrusion. Alternatively, the contact portion between the LCOS housing 202 and the lens housing 402 may have a protrusion, and the lens housing 402 may have a groove. Thus, the LCOS housing 202 and the lens housing 402 can be assembled together through the plug-in fit of the protrusion and the groove. In some embodiments, a locking structure or similar method may be provided on the groove and the protrusion for fixation, or fixation may be achieved by potting adhesive.

[0023] Therefore, by connecting the LCOS housing 202 and the lens housing 402 through a plug-in method, the problems of defocusing caused by positional shift of the LCOS module 201 due to the use of PC adhesive layer, or damage caused by easy disassembly, are avoided, thereby improving the overall image clarity of the optical engine and extending the overall service life of the optical engine.

[0024] Optionally, Figure 2 This is a first-view structural schematic diagram of the optomechanical focusing structure proposed in an embodiment of the present invention. Figure 3 This is a schematic diagram of the second-view structure of the optical-mechanical focusing structure proposed in the embodiment of the present invention. Figure 4 This is a third-view structural schematic diagram of the optomechanical focusing structure proposed in an embodiment of the present invention. (See attached diagram.) Figures 1 to 4 As shown, the LCOS housing 202 includes a base 21, a limiting part 22, and a plurality of protrusions 23; the protrusions 23 are protrusions that protrude from the first surface 203 of the base 21 along a first direction, the first direction being the direction in which the second reflected beam L3 is transmitted; the limiting part 22 is used to support and limit the LCOS module 201. The lens housing 402 includes a groove 24 that mates with the protrusion 23. The groove 24 is a groove formed by recessing from the surface 403 of the lens housing 402 along a first direction. The groove 24 is inserted into the protrusion 23, and the surface 403 of the lens housing 402 is in contact with the first surface 203.

[0025] It is understandable that the first direction is the direction in which the second reflected beam L3 is transmitted, such as... Figures 1 to 4 As shown, the first direction can be the negative x-direction, that is, the direction in which the LCOS housing 202 points towards the lens housing 402. By providing a groove 24 on the lens housing 402 and a protrusion 23 on the LCOS housing 202, the two can be quickly aligned along the transmission direction parallel to the second reflected beam L3 when they are plugged in, reducing alignment errors. At the same time, after the protrusion is inserted into the groove, the surface 403 of the lens housing 402 fits against the first surface 203 of the base 21 of the LCOS housing 202, resulting in higher connection stability and a lower probability of displacement of the LCOS module 201 due to external forces. This ensures the positional accuracy after focusing and maintains clear image output of the optical engine for a long time. Furthermore, during disassembly, the two housings can be separated simply by removing the fixing of the plug-in structure without damaging the LCOS module 201, facilitating maintenance and secondary debugging.

[0026] In one embodiment, the protrusion 23 can be a columnar protrusion, and the groove 24 can be a columnar groove. For example, it can be a cylindrical or rounded quadrangular prism shape.

[0027] Optionally, continue to refer to Figures 1 to 4 Each protrusion 23 is provided along the periphery of the base 21, and each groove 24 is provided along the periphery of the lens housing 402. Each groove 24 has a first opening in the circumferential direction of the lens housing 402.

[0028] The protrusion 23 is located on the periphery of the base 21, and the groove 24 is located on the periphery of the lens housing 402. This allows the insertion force between the LCOS housing 202 and the lens housing 402 to be evenly distributed on the periphery, avoiding stress concentration in local areas, reducing the risk of stress deformation of the housing, and further ensuring the positional accuracy of the LCOS module 201.

[0029] Furthermore, after each protrusion 23 is inserted into its corresponding groove 24, a certain amount of assembly deformation space can be reserved between the protrusion 23 and the groove 24. The circumferential first opening can increase the assembly deformation space, avoiding the inability of the protrusion to be fully inserted into the groove due to machining tolerances, thus reducing the machining accuracy requirements and assembly difficulty. At the same time, it can also facilitate the insertion of a pry bar to separate the two housings, further improving the convenience of disassembly and debugging. In addition, after the two housings are assembled, adhesive can be applied into the groove 24 through the circumferential first opening to fix and bond the groove 24 and the protrusion 23. Moreover, during the assembly of the two housings, the assembly status can be observed through the first opening, making it convenient to detect alignment deviations in a timely manner and make adjustments, further improving assembly accuracy and reducing the probability of defective products.

[0030] Optionally, continue to refer to Figures 1 to 4 The limiting part 22 is a bearing groove 221 formed by extending from the second surface 204 of the base 21 along a second direction, which is the direction in which the first reflected beam L2 is transmitted; the bearing groove 221 has a second opening along the circumferential direction of the LCOS shell 202, and in the first direction, the first surface 203 of the base 21 corresponding to the second opening is not provided with a protrusion 23.

[0031] In this diagram, the first direction is the direction in which the second reflected beam L3 is transmitted; in this diagram, the first direction can be the negative direction of the x-axis. The second direction is the direction in which the first reflected beam L2 is transmitted; in this diagram, the second direction can be the positive direction of the x-axis. The space of the support groove 221 formed by the limiting part 22 can match the shape of the LCOS module 201 to support the LCOS module 201. By providing a second opening on the support groove 221, the support groove 221 forms a "basket" shape, facilitating the placement and removal of the LCOS module 201 for assembly, debugging, or maintenance. Furthermore, no protrusion 23 is provided on the first surface 203 of the base 21 corresponding to the second opening, which avoids interference between the operating area and the insertion structure. If a protrusion 23 and a recess 24 are provided below the base 21 corresponding to the second opening, the gap between the protrusion 23 and the recess 24 can easily cause instability in the overall structure when the LCOS module 201 is placed or removed. Meanwhile, the second opening is located on the same plane as the light-emitting lens, without the protrusion 23 and the groove 24, which can maintain the overall aesthetics and neatness of the machine.

[0032] Optionally, continue to refer to Figures 1 to 4 The bottom of the support groove 221 is provided with a first light-transmitting perforation 222, and the surface 403 of the lens housing 402 is provided with a second light-transmitting perforation 404. The first light-transmitting perforation 222 and the second light-transmitting perforation 404 are fitted together to form a light channel through which the first reflected beam L2 and the second reflected beam L3 pass.

[0033] The LCOS module 201 is attached to the first light-transmitting cutout 222. The first reflected beam L2 can pass through the second light-transmitting cutout 404 and the first light-transmitting cutout 222 in sequence and be incident on the LCOS module 201. The second reflected beam L3 formed after reflection can pass through the first light-transmitting cutout 222 and the second light-transmitting cutout 404 in sequence and be transmitted to the lens module 401. The light-transmitting cutout can provide stable support and limit for the LCOS module 201 without blocking the light path, ensuring the stability of beam transmission. At the same time, it eliminates the need for additional light-transmitting glass, simplifies the structure, and reduces the probability of light loss.

[0034] In one embodiment, the first light-transmitting cutout 222 and the second light-transmitting cutout 404 have the same shape, and the shape can be the shape of the light-emitting surface of the LCOS module 201, such as a round rectangle.

[0035] Optionally, continue to refer to Figures 1 to 4 The support groove 221 has a first take-up portion 223 on its groove wall. The first take-up portion 223 is a recessed portion formed from the groove wall along the second direction. The take-up portion is used to expose part of the LCOS module 201.

[0036] In one embodiment, the height of the LCOS module 201 in the first direction is greater than the depth of the support groove 221, and at least one first picking part 223 is provided in the circumferential direction of the support groove 221. This allows operators to easily pick up the LCOS module 201 from the support groove 221 by pinching the exposed part of the LCOS module 201 with tools such as tweezers. This avoids the LCOS module 201 getting stuck in the groove and is difficult to remove, reducing the difficulty of disassembling and debugging the LCOS module 201. At the same time, it will not cause scratch damage to the surface of the LCOS module 201, thus improving the safety of maintenance and debugging.

[0037] Furthermore, when the LCOS module 201 is placed into the support groove 221 by the robotic arm, the first pick-up part 223 is designed with a release position to avoid collisions between the robotic arm's gripping part and the groove wall, ensuring smooth completion of the automated assembly process, improving assembly efficiency, and reducing the risk of material jamming in automated production. At the same time, the exposed portion can also serve as a reference for assembly alignment, facilitating quick alignment of the installation position and further improving assembly accuracy.

[0038] Optionally, continue to refer to Figures 1 to 4 The inner corner of the support groove 221 is provided with a second picking part 224, which is an arc-shaped corner.

[0039] In particular, the corners of the LCOS module 201 are generally designed with right angles. The second pick-up part 224 with arc corners can prevent the right angle corners of the LCOS module 201 from getting stuck with the right angle interior corner of the bearing groove 221. The operator can insert a tool through the gap of the arc corner and easily remove the LCOS module 201 with the help of the first pick-up part 223, which further reduces the difficulty of disassembly and assembly. At the same time, the arc interior corner can also disperse stress and prevent stress concentration at the interior corner of the bearing groove 221 from causing cracks, thereby improving the structural strength and service life.

[0040] Optionally, continue to refer to Figures 1 to 4 The lens housing 402 includes a projection light outlet 405, and the plane where the second opening is located is parallel to the plane where the projection light outlet 405 is located.

[0041] The second opening is located on the same plane as the projection light outlet 405. No protrusion 23 and groove 24 are provided below the LCOS housing 202 corresponding to the second opening. This not only increases the stability of the overall structure, but also maintains the aesthetics and neatness of the whole machine.

[0042] Optionally, continue to refer to Figures 1 to 4 The lighting assembly 300 includes a lighting housing 302, which has a first light-transmitting port, and a lens housing 402 which has a second light-transmitting port. The first light-transmitting port and the second light-transmitting port are fitted together to allow the lighting beam L1 to pass through. The lighting housing 302 and the lens housing 402 are integrally formed.

[0043] The lighting component 300 includes a lighting source 301 and a lighting housing 302. The lighting housing 302 and the lens housing 402 can be integrally formed, which can reduce the number of assembly parts, reduce assembly tolerances, and avoid misalignment between the lighting housing 302 and the lens housing 402 affecting the optical axis alignment, thereby improving the accuracy of beam transmission. It also reduces assembly steps, improves production and assembly efficiency, and reduces the splicing gap between components, thereby improving the stability and airtightness of the overall structure.

[0044] In other embodiments, the connection between the lighting housing 302 and the lens housing 402 can be configured in a detachable manner to improve assembly flexibility.

[0045] Figure 5 This is a flowchart illustrating the assembly method of the optomechanical focusing structure proposed in an embodiment of the present invention. This method is implemented based on the optomechanical focusing structure of any embodiment of the present invention; such as... Figure 5 As shown, the method includes: S101, control the robotic arm to grasp the LCOS module and release the LCOS module into the carrier slot of the LCOS shell to form an LCOS assembly.

[0046] The robotic arm can be a pneumatic gripper commonly used in industrial production. Through a preset positioning program, it can accurately align with the bearing groove to complete the material unloading. The first and second gripping parts on the LCOS shell provide sufficient space for the release of the robotic arm's gripper, preventing structural collisions and ensuring a smooth unloading process. Simultaneously, the exposed edge of the LCOS module can serve as an alignment reference, improving assembly positioning accuracy. In one embodiment, UV adhesive can also be used to fix the LCOS shell and the LCOS module together.

[0047] S102, control the robotic arm to grasp the LCOS component and align the protrusion of the LCOS housing with the groove of the lens housing, so that the protrusion is inserted into the groove.

[0048] During insertion, the guide slope of the protrusion guides the protrusion to slide smoothly into the groove, avoiding alignment jamming and ensuring a smooth insertion process. After alignment and insertion, the LCOS housing and lens housing achieve initial positioning and connection. At this point, the relative positions of the LCOS housing and lens housing are initially restricted, eliminating the need for additional temporary fixation before proceeding to the next step, thus simplifying the assembly process.

[0049] S103, power on the LCOS component and control the robot arm to adjust the relative position between the LCOS housing and the lens housing, so that the image emitted by the lens component reaches the preset clarity, and keep the relative position between the current protrusion and the groove fixed.

[0050] When the device is projecting, the image clarity can be observed through the projection screen, or the image result can be automatically detected by the built-in clarity recognition module. When the clarity reaches the preset standard, the adjustment action stops and the current relative position is maintained. There is no need to install an additional focus drive mechanism to maintain the position, which simplifies the structure after focusing.

[0051] S104, and fill the gap between the protrusion and the groove with glue.

[0052] After adjusting the LCOS component to the appropriate position, the robotic arm continues to grip the LCOS component while controlling the glue applicator to fill the gap between the protrusion and the groove with glue, thus securing the LCOS component to the lens housing. In one embodiment, the image clarity can be monitored in real time while filling the glue. If the glue filling causes the image to become blurry, the position of the LCOS component can be further fine-tuned by controlling the robotic arm.

[0053] Therefore, once the adhesive has cured, it stably locks the relative position of the LCOS component and the lens housing, completing the focusing assembly. The entire focusing assembly process is automated by a robotic arm in conjunction with electrical performance tuning, eliminating the need for pre-set additional fixing points. The position can be flexibly adjusted according to the actual imaging effect, adapting to different assembly precision requirements and effectively improving the image clarity after focusing. Furthermore, the adhesive fixation after focusing ensures stable position retention, eliminating the need for additional locking structures, simplifying the overall optomechanical structure, and reducing parts processing and assembly costs. Compared to the traditional assembly method that requires setting a PC adhesive layer before adjustment, this method significantly improves focusing accuracy and efficiency, adapts to the needs of automated mass production, and reduces the focusing defect rate.

[0054] Therefore, by assembling the LCOS module on a bracket, and fixing the bracket to the LCOS module with UV adhesive, and by setting multiple positioning adjustment posts on the bracket, the distance in all directions (front, back, left, right, up, and down) can be adjusted within the holes on the LCOS housing. After adjustment, UV adhesive is filled into the holes from the side and cured. This operation is convenient and eliminates the need for applying tape. Moreover, after the UV adhesive fills the holes and cures, there will be no positional movement when the FPC cable is clipped onto the LCOS module. If the LCOS module needs maintenance, only the positions of a few positioning adjustment posts need to be addressed, and the UV adhesive also prevents direct contact with the LCOS from causing damage.

[0055] In summary, the optomechanical focusing structure and its assembly method proposed in this embodiment of the invention include: an LCOS component, an illumination component, and a lens component. The LCOS component includes an LCOS module and an LCOS housing, and the lens component includes a lens module and a lens housing. The illumination component emits an illumination beam, the lens module is located on the transmission path of the illumination beam, and the lens module is used to reflect the illumination beam to form a first reflected beam. The LCOS module is located on the transmission path of the first reflected beam and is used to reflect the first reflected beam to form a second reflected beam. The lens module is also located on the transmission path of the second reflected beam and is used to transmit the second reflected beam. The LCOS housing is used to support the LCOS module, and the lens housing is used to accommodate the lens module. The LCOS housing and the lens housing are connected by a plug-in connection. The optomechanical focusing structure proposed in this invention, by connecting the LCOS housing and the lens housing using a plug-in connection, provides more flexible adjustment methods. Disassembly and maintenance will not damage the LCOS module, and it avoids a series of problems caused by the use of PC adhesive.

[0056] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A focusing structure based on optical mechanism, characterized in that, include: The LCOS assembly, the illumination assembly, and the lens assembly, wherein the LCOS assembly includes an LCOS module and an LCOS housing, and the lens assembly includes a lens module and a lens housing; The lighting component emits an illumination beam, the lens module is located on the transmission path of the illumination beam, the lens module is used to reflect the illumination beam to form a first reflected beam, the LCOS module is located on the transmission path of the first reflected beam, the LCOS module is used to reflect the first reflected beam to form a second reflected beam, and the lens module is also located on the transmission path of the second reflected beam to transmit the second reflected beam. The LCOS housing is used to carry the LCOS module, and the lens housing is used to accommodate the lens module. The LCOS housing and the lens housing are connected by a plug-in connection.

2. The optical-mechanical focusing structure according to claim 1, characterized in that, The LCOS housing includes a base, a limiting part, and a plurality of protrusions; the protrusions are protrusions that protrude from a first surface of the base along a first direction, the first direction being the direction in which the second reflected beam is transmitted; the limiting part is used to support and limit the LCOS module. The lens housing includes a groove that mates with the protrusion. The groove is formed by recessing from the surface of the lens housing along the first direction. The groove is inserted into the protrusion, and the surface of the lens housing is in contact with the first surface.

3. The optical-mechanical focusing structure according to claim 2, characterized in that, Each of the protrusions is disposed along the periphery of the base portion, each of the grooves is disposed along the periphery of the lens housing, and each of the grooves has a first opening in the circumferential direction of the lens housing.

4. The optical-mechanical focusing structure according to claim 2, characterized in that, The limiting portion is a bearing groove extending from the second surface of the base along a second direction, the second direction being the direction in which the first reflected light beam is transmitted; the bearing groove has a second opening along the circumferential direction of the LCOS shell, and in the first direction, the first surface of the base corresponding to the second opening is not provided with the protrusion.

5. The optical-mechanical focusing structure according to claim 4, characterized in that, The bottom of the bearing groove is provided with a first light-transmitting perforation, and the surface of the lens housing is provided with a second light-transmitting perforation; The first light-transmitting perforation and the second light-transmitting perforation are fitted together to form a light channel through which the first reflected beam and the second reflected beam pass.

6. The optical-mechanical focusing structure according to claim 4, characterized in that, The support groove has a first pick-up portion on its groove wall. The first pick-up portion is a recessed portion formed from the groove wall along the second direction. The pick-up portion is used to expose part of the LCOS module.

7. The optical-mechanical focusing structure according to claim 4, characterized in that, The inner corner of the wall of the bearing groove is provided with a second picking part, which is an arc-shaped corner.

8. The optical-mechanical focusing structure according to claim 4, characterized in that, The lens housing includes a projection light outlet, and the plane where the second opening is located is parallel to the plane where the projection light outlet is located.

9. The optical-mechanical focusing structure according to claim 1, characterized in that, The lighting assembly includes a lighting housing with a first light-transmitting port and a lens housing with a second light-transmitting port. The first light-transmitting port and the second light-transmitting port are fitted together to allow the lighting beam to pass through. The lighting housing and the lens housing are integrally formed.

10. A method for assembling an optomechanical focusing structure, characterized in that, Based on the optical-mechanical focusing structure as described in any one of claims 1-9; the method includes: The robotic arm is controlled to grasp the LCOS module and release the LCOS module into the carrier groove of the LCOS shell to form an LCOS assembly; The robotic arm is controlled to grasp the LCOS component and align the protrusion of the LCOS housing with the groove of the lens housing, so that the protrusion is inserted into the groove. Power on the LCOS component and control the robotic arm to adjust the relative position between the LCOS housing and the lens housing, so that the image emitted by the lens component reaches the preset clarity, and keep the relative position between the protrusion and the groove fixed. The gap between the protrusion and the groove is filled with glue.

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