Lightweight common-aperture infrared / laser rangefinder integrated camera

Abstract

The present application belongs to the field of aviation / aerospace photoelectric remote sensing imaging detection technology, and particularly relates to a light and small common-aperture infrared / laser ranging integrated camera. During operation, infrared incident light sequentially passes through a first mirror surface, a third mirror surface, a second mirror surface and a beam splitter, and is then reflected onto an infrared receiving assembly. Incident laser light sequentially passes through the first mirror surface, the third mirror surface, the second mirror surface and the beam splitter along an optical path, and is then refracted onto a laser receiving assembly. The material of the annular multi-surface common main mirror, secondary mirror, main mirror barrel and secondary mirror seat is aluminum alloy, which is light in weight, high in strength and easy to process, and is beneficial to the manufacture and adjustment of the device, and is more conducive to the realization of athermalization design. The device still maintains good imaging quality or detection performance under a wide dynamic temperature environment of -150 DEG C to +80 DEG C, greatly reduces the volume of the device, realizes lightweight design of the system, solves the problems of low optical system transmittance and large optical-mechanical structure background radiation at high temperatures, and improves the detection performance of the system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aviation / aerospace photoelectric remote sensing imaging detection, and particularly relates to a light and small common-aperture infrared / laser ranging integrated camera. BACKGROUND

[0002] In the prior art, the optical system of a conventional common-aperture infrared / laser ranging integrated camera adopts a catadioptric structure, which is composed of a primary and secondary telescope sub-system, a light splitting prism, a correction lens group and the like. This optical configuration cannot reduce the volume and weight of the system, and thus cannot realize the light and small type of the system.

[0003] A single optical element annular aperture ultrathin imaging system realizes relatively high imaging quality in a mid-long wave infrared dual waveband, but this system is designed only for a common focal plane and cannot be applied to the imaging requirements of separated detectors of a laser / infrared dual-mode detection system.

[0004] Another single optical element annular aperture ultrathin imaging system selects infrared chalcogenide glass IRG206 as a base material, and simultaneously adopts a light splitting element to split infrared / laser dual modes. In order to realize the athermalization of the system in a long wave infrared waveband, titanium alloy material is matched, and in a laser waveband, aluminum alloy material is matched. The light weight of the system cannot be guaranteed. In addition, the single optical element (IRG206) is coated with a double-layer antireflection film to increase the transmittance of short and long waves, but there is still a certain loss of energy. Especially in a high temperature environment, the system background noise increases sharply, which is not conducive to the detection of remote small targets.

[0005] Therefore, the light and small common-aperture infrared / laser ranging integrated camera is proposed. SUMMARY

[0006] The purpose of the present application is to provide a light and small common-aperture infrared / laser ranging integrated camera to solve the above problems.

[0007] To achieve the above purpose, the present application provides the following solutions:

[0008] The light and small common-aperture infrared / laser ranging integrated camera comprises a main lens barrel, a ring-shaped multi-surface common main mirror and a secondary mirror seat coaxially and fixedly installed on opposite sides of the main lens barrel, and a laser emitter fixedly installed on the upper side of the main lens barrel.

[0009] The ring-shaped multi-surface common main mirror is coaxially provided with a first mirror surface and a second mirror surface on the side facing the secondary mirror seat, the first mirror surface is located on the outer side of the second mirror surface, and an infrared receiving assembly is fixedly installed on the side of the ring-shaped multi-surface common main mirror facing away from the secondary mirror seat.

[0010] The secondary mirror and the beam splitter are coaxially fixedly mounted on the side of the secondary mirror mount facing the annular multifaceted main mirror. The secondary mirror is located on the outer edge of the beam splitter. A laser receiving component is coaxially fixedly mounted on the side of the secondary mirror mount facing away from the annular multifaceted main mirror.

[0011] The annular multifaceted primary mirror, the secondary mirror, the primary mirror tube, and the secondary mirror mount are all made of aluminum alloy.

[0012] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, the annular multifaceted main mirror includes a main mirror body. Multiple mounting lugs are circumferentially spaced at equal intervals along the outer edge of the main mirror body. A fifth screw passes through each mounting lug and is threaded onto one side of the main mirror barrel. The main mirror body and the main mirror barrel are coaxially arranged. The first reflecting mirror surface and the second reflecting mirror surface are both coaxially formed on the side of the main mirror body facing the secondary mirror mount. A transition ring is coaxially arranged between the first reflecting mirror surface and the second reflecting mirror surface. The transition ring is formed on the main mirror body. A first through hole for light to pass through is coaxially formed on the main mirror body.

[0013] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, the infrared receiving component includes an infrared imaging plate and an infrared interface plate. The infrared imaging plate and the infrared interface plate are both coaxially fixed to the main mirror body by a plurality of sixth screws. The infrared imaging plate is located on the side of the main mirror body that is away from the secondary mirror mount. A first gap is left between the infrared imaging plate and the main mirror body. An infrared focal plane is provided on the side of the infrared imaging plate facing the main mirror body. The infrared focal plane is correspondingly provided with the first through hole. The infrared interface plate is located on the side of the infrared imaging plate that is away from the main mirror body. A second gap is left between the infrared imaging plate and the infrared interface plate.

[0014] In the lightweight common aperture infrared / laser rangefinder integrated camera of the present invention, the secondary mirror mount is provided with a plurality of third through holes at equal intervals in the circumferential direction. The third through holes are close to the outer edge of the secondary mirror mount, and a first screw is inserted in the third through hole. The first screw is threadedly connected to the main mirror barrel.

[0015] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, a beam splitter mount is fixed to the side of the secondary mirror mount facing away from the primary mirror body by two fourth screws. The beam splitter mount and the secondary mirror mount are coaxially arranged. A second through hole for light to pass through is coaxially opened in the beam splitter mount. One end of the beam splitter mount passes into the secondary mirror mount and is bonded to the beam splitter. The beam splitter and the beam splitter mount are coaxially arranged, and the beam splitting surface of the beam splitter faces the primary mirror body.

[0016] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, the secondary mirror is fixed to the side of the secondary mirror mount facing the primary mirror body by two second screws, the secondary mirror and the secondary mirror mount are coaxially arranged, and the third reflecting mirror surface of the secondary mirror faces the primary mirror body.

[0017] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, the laser receiving component includes a laser receiving focal plane PCB board, the laser receiving focal plane PCB board is fixed to the beam splitter mount by a plurality of third screws, a third gap is left between the laser receiving focal plane PCB board and the beam splitter mount, a laser receiving focal plane is provided on the laser receiving focal plane PCB board, and the laser receiving focal plane is correspondingly provided with the second through hole.

[0018] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, a second stress unloading groove is provided between the main mirror body and the mounting lug, and a first stress unloading groove is circumferentially opened at the outer edge of the main mirror body, the first stress unloading groove being located on the side of the mounting lug closer to the main mirror barrel.

[0019] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, a laser receiving focal plane trimming pad is sleeved on the outside of the third screw, and the two ends of the laser receiving focal plane trimming pad abut against the beam splitter mount and the laser receiving focal plane PCB board, respectively.

[0020] In the lightweight common aperture infrared / laser ranging integrated camera of the present invention, a first pad and an infrared focal plane trimming pad are sleeved on the outer side of the sixth screw. The infrared focal plane trimming pad is located between the infrared imaging plate and the main mirror body, and the first pad is located between the infrared imaging plate and the infrared interface plate.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects:

[0022] During operation, the infrared incident light passes through the first reflecting mirror, the third reflecting mirror, and the second reflecting mirror in sequence along the optical path and then shines on the beam splitter. It is then reflected by the beam splitter to the infrared receiving component. The incident laser passes through the first reflecting mirror, the third reflecting mirror, and the second reflecting mirror in sequence along the optical path and then shines on the beam splitter. It is then refracted by the beam splitter to shine on the laser receiving component.

[0023] The annular multifaceted primary mirror, secondary mirror, primary mirror tube, and secondary mirror mount are all made of aluminum alloy, which is lightweight, high-strength, and easy to process. This facilitates the manufacturing and assembly of the device and makes it easier to achieve a pyrogenic design. The device maintains good imaging quality or detection performance in a wide dynamic temperature environment of -150℃ to +80℃, significantly reducing the size of the device and achieving a lightweight design. This solves the problems of low transmittance of the optical system and high background radiation of the optomechanical structure at high temperatures, thereby improving the detection performance of the system. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0026] Fig. 2 This is an isometric view of the present invention;

[0027] Fig. 3 This is an axonometric view of the annular multifaceted primary mirror in this invention;

[0028] Fig. 4 This is a schematic diagram of the annular multifaceted primary mirror in this invention;

[0029] The components include: 1. Ring-shaped multifaceted primary mirror; 101. First reflecting mirror; 102. Second reflecting mirror; 103. Transition ring; 104. First stress unloading groove; 105. Second stress unloading groove; 106. Mounting lug; 107. Primary mirror body; 2. Secondary mirror; 201. Third reflecting mirror; 3. Beam splitter; 301. Beam splitter surface; 4. Laser receiving focal plane; 5. Infrared focal plane; 6. Primary mirror tube; 7. Secondary mirror mount; 8. Beam splitter mount; 9. Laser receiving focal plane PCB board; 10. Laser receiving focal plane trimming pad; 11. Infrared focal plane trimming pad; 12. Infrared imaging board; 13. First pad; 14. Infrared interface board; 15. Laser emitter; 16. First screw; 17. Second screw; 18. Third screw; 19. Fourth screw; 20. Fifth screw; 21. Sixth screw. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figs. 1 to 4 The present invention discloses a lightweight common aperture infrared / laser ranging integrated camera, comprising: a main lens tube 6, an annular multifaceted main lens 1 and a secondary lens mount 7 respectively coaxially fixed on opposite sides of the main lens tube 6, and a laser emitter 15 fixedly mounted on the upper part of the main lens tube 6;

[0033] A first reflecting mirror 101 and a second reflecting mirror 102 are coaxially arranged on the side of the annular multifaceted main mirror 1 facing the secondary mirror mount 7. The first reflecting mirror 101 is located outside the second reflecting mirror 102. An infrared receiving component is fixedly installed on the side of the annular multifaceted main mirror 1 facing away from the secondary mirror mount 7.

[0034] On the side of the secondary mirror mount 7 facing the annular multifaceted main mirror 1, the secondary mirror 2 and the beam splitter 3 are coaxially fixedly installed. The secondary mirror 2 is located on the outer edge of the beam splitter 3. On the side of the secondary mirror mount 7 facing away from the annular multifaceted main mirror 1, the laser receiving component is coaxially fixedly installed.

[0035] The primary mirror 1, secondary mirror 2, primary mirror tube 6, and secondary mirror mount 7 of the annular multifaceted composite structure are made of aluminum alloy.

[0036] During operation, the infrared incident light passes sequentially through the first reflecting mirror 101, the third reflecting mirror 201, and the second reflecting mirror 102 along the optical path and then illuminates the beam splitter 3. It is then reflected by the beam splitter 3 to the infrared receiving component. The incident laser passes sequentially through the first reflecting mirror 101, the third reflecting mirror 201, and the second reflecting mirror 102 along the optical path and then illuminates the beam splitter 3. It is then refracted by the beam splitter 3 and illuminates the laser receiving component.

[0037] The annular multifaceted primary mirror 1, secondary mirror 2, primary mirror tube 6, and secondary mirror mount 7 are made of aluminum alloy, which is lightweight, high-strength, and easy to process. This facilitates the manufacturing and assembly of the device and makes it easier to achieve a pyrogenic design. The device maintains good imaging quality or detection performance in a wide dynamic temperature environment of -150℃ to +80℃, significantly reduces the size of the device, realizes the lightweight design of the system, solves the problems of low transmittance of the optical system and large background radiation of the optomechanical structure at high temperatures, and improves the detection performance of the system.

[0038] In one alternative embodiment, the annular multifaceted primary mirror 1 includes a primary mirror body 107. Multiple mounting lugs 106 are circumferentially spaced at equal intervals along the outer edge of the primary mirror body 107. A fifth screw 20 passes through each mounting lug 106 and is threaded onto one side of the primary mirror barrel 6. The primary mirror body 107 is coaxially aligned with the primary mirror barrel 6. A first reflecting mirror surface 101 and a second reflecting mirror surface 102 are coaxially formed on the side of the primary mirror body 107 facing the secondary mirror mount 7. A transition ring 103 is coaxially formed between the first reflecting mirror surface 101 and the second reflecting mirror surface 102. The transition ring 103 is formed on the primary mirror body 107. A first through-hole for light to pass through is coaxially formed on the primary mirror body 107.

[0039] In one alternative embodiment, the infrared receiving assembly includes an infrared imaging board 12 and an infrared interface board 14. Both the infrared imaging board 12 and the infrared interface board 14 are coaxially fixed to the main mirror body 107 via multiple sixth screws 21. The infrared imaging board 12 is located on the side of the main mirror body 107 facing away from the secondary mirror mount 7. A first gap is left between the infrared imaging board 12 and the main mirror body 107. An infrared focal plane 5 is provided on the side of the infrared imaging board 12 facing the main mirror body 107. The infrared focal plane 5 is correspondingly provided with the first through hole. The infrared interface board 14 is located on the side of the infrared imaging board 12 facing away from the main mirror body 107. A second gap is left between the infrared imaging board 12 and the infrared interface board 14.

[0040] In one alternative, the secondary mirror mount 7 is provided with a plurality of third through holes at equal intervals in the circumferential direction. The third through holes are close to the outer edge of the secondary mirror mount 7, and a first screw 16 is inserted into the third through hole. The first screw 16 is threadedly connected to the main mirror barrel 6.

[0041] In one alternative, a beam splitter mount 8 is fixed to the side of the secondary mirror mount 7 facing away from the primary mirror body 107 by two fourth screws 19. The beam splitter mount 8 is coaxially arranged with the secondary mirror mount 7. A second through hole for light to pass through is coaxially opened in the beam splitter mount 8. One end of the beam splitter mount 8 passes into the secondary mirror mount 7 and is bonded to the beam splitter 3. The beam splitter 3 is coaxially arranged with the beam splitter mount 8, and the beam splitting surface 301 of the beam splitter 3 faces the primary mirror body 107.

[0042] In one alternative, the secondary mirror 2 is fixed to the side of the secondary mirror mount 7 facing the primary mirror body 107 by two second screws 17. The secondary mirror 2 and the secondary mirror mount 7 are coaxially arranged, and the third reflecting mirror surface 201 of the secondary mirror 2 faces the primary mirror body 107.

[0043] In one alternative embodiment, the laser receiving assembly includes a laser receiving focal plane PCB board 9, which is fixed to the beam splitter mount 8 by a plurality of third screws 18. A third gap is left between the laser receiving focal plane PCB board 9 and the beam splitter mount 8. A laser receiving focal plane 4 is provided on the laser receiving focal plane PCB board 9, and the laser receiving focal plane 4 is correspondingly provided with a second through hole.

[0044] In one alternative, a second stress relief groove 105 is provided between the primary mirror body 107 and the mounting lug 106, and a first stress relief groove 104 is circumferentially provided at the outer edge of the primary mirror body 107, the first stress relief groove 104 being located on the side of the mounting lug 106 near the primary mirror barrel 6.

[0045] The installation stress is reduced by setting the first stress unloading groove 104 and the second stress unloading groove 105.

[0046] In one alternative, a laser receiving focal plane trimming pad 10 is fitted on the outside of the third screw 18, and the two ends of the laser receiving focal plane trimming pad 10 abut against the beam splitter mount 8 and the laser receiving focal plane PCB board 9, respectively.

[0047] By adjusting the thickness of the laser receiving focal plane trimming pad 10, the value of the third gap is changed, so that the laser is focused onto the laser receiving focal plane 4.

[0048] In one alternative, the outer side of the sixth screw 21 is fitted with a first pad 13 and an infrared focal plane trimming pad 11, the infrared focal plane trimming pad 11 being located between the infrared imaging plate 12 and the primary mirror body 107, and the first pad 13 being located between the infrared imaging plate 12 and the infrared interface plate 14.

[0049] By adjusting the thickness of the infrared focal plane trimming pad 11, the value of the infrared focal plane trimming pad 11 is changed, so that the infrared light path is converged on the infrared focal plane 5.

[0050] Specific work process:

[0051] Infrared incident light and laser light enter from the secondary mirror mount 7. The infrared incident light first shines on the first reflecting mirror 101, then shines on the third reflecting mirror 201 after being reflected by the first reflecting mirror 101, then shines on the second reflecting mirror 102 after being reflected by the third reflecting mirror 201, then shines on the beam splitter 301 after being reflected by the second reflecting mirror 102, and finally shines on the infrared focal plane 5 of the infrared imaging plate 12 after being reflected by the beam splitter 301 and passing through the first through hole.

[0052] The incident laser first shines on the first reflecting mirror 101, then shines on the third reflecting mirror 201 after being reflected by the first reflecting mirror 101, then shines on the second reflecting mirror 102 after being reflected by the third reflecting mirror 201, then shines on the beam splitter 301 after being reflected by the second reflecting mirror 102, and finally shines on the laser receiving focal plane 4 of the laser receiving focal plane PCB board 9 after being refracted by the beam splitter 301 and passing through the second through hole.

[0053] The lightweight, compact common-aperture infrared / laser ranging integrated camera of this invention adopts an all-aluminum integrated ring multifaceted optical structure. The uncooled long-wave infrared (384×288) and 850nm laser ranging receivers share the same optical system in the entire payload assembly, with an F / # of 1.2. The overall weight is no more than 65g. It can achieve a ranging distance of no less than 1km for space satellite targets and an infrared detection distance of no less than 30km against a deep space background. Specific optical system specifications are shown in Table 1.

[0054] Table 1. Main parameters of the optical system of the lightweight common aperture infrared-laser ranging integrated camera.

[0055]

[0056] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 of this invention.

[0057] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A lightweight, compact common-aperture infrared / laser ranging integrated camera, characterized in that, include: The main mirror tube (6) has a ring-shaped multi-faceted main mirror (1) and a secondary mirror mount (7) coaxially fixed on opposite sides. A laser emitter (15) is fixedly installed on the main mirror tube (6). The annular multifaceted main mirror (1) has a first reflecting mirror (101) and a second reflecting mirror (102) coaxially arranged on the side facing the secondary mirror mount (7). The first reflecting mirror (101) is located outside the second reflecting mirror (102). An infrared receiving component is fixedly installed on the side of the annular multifaceted main mirror (1) facing away from the secondary mirror mount (7). The secondary mirror mount (7) is coaxially fixedly mounted with a secondary mirror (2) and a beam splitter (3) on the side facing the annular multifaceted main mirror (1). The secondary mirror (2) is located on the outer edge of the beam splitter (3). The secondary mirror mount (7) is coaxially fixedly mounted with a laser receiving component on the side facing away from the annular multifaceted main mirror (1). The annular multifaceted primary mirror (1), the secondary mirror (2), the primary mirror tube (6), and the secondary mirror mount (7) are made of aluminum alloy; The annular multifaceted main mirror (1) includes a main mirror body (107). Multiple mounting lugs (106) are evenly spaced around the outer edge of the main mirror body (107). A fifth screw (20) passes through the mounting lug (106) and is threaded to one side of the main mirror barrel (6). The main mirror body (107) and the main mirror barrel (6) are coaxially arranged. The first reflecting mirror (101) and the second reflecting mirror (102) are coaxially opened on the side of the main mirror body (107) facing the secondary mirror mount (7). A transition ring (103) is coaxially arranged between the first reflecting mirror (101) and the second reflecting mirror (102). The transition ring (103) is opened on the main mirror body (107). A first through hole for light to pass through is coaxially opened on the main mirror body (107). The secondary mirror (2) is fixed to the side of the secondary mirror base (7) facing the primary mirror body (107) by two second screws (17). The secondary mirror (2) is coaxially arranged with the secondary mirror base (7), and the third reflecting mirror surface (201) of the secondary mirror (2) faces the primary mirror body (107). During operation, the infrared incident light passes sequentially through the first reflecting mirror (101), the third reflecting mirror (201), and the second reflecting mirror (102) along the optical path and then illuminates the beam splitter (3). The light is then reflected by the beam splitter (3) to the infrared receiving component. The incident laser passes sequentially through the first reflecting mirror (101), the third reflecting mirror (201), and the second reflecting mirror (102) along the optical path and then illuminates the beam splitter (3). The laser is then refracted by the beam splitter (3) and illuminates the laser receiving component.

2. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 1, characterized in that: The infrared receiving assembly includes an infrared imaging plate (12) and an infrared interface plate (14). Both the infrared imaging plate (12) and the infrared interface plate (14) are coaxially fixed to the main mirror body (107) by a plurality of sixth screws (21). The infrared imaging plate (12) is located on the side of the main mirror body (107) facing away from the secondary mirror mount (7). A first gap is left between the infrared imaging plate (12) and the main mirror body (107). An infrared focal plane (5) is provided on the side of the infrared imaging plate (12) facing the main mirror body (107). The infrared focal plane (5) is correspondingly provided with the first through hole. The infrared interface plate (14) is located on the side of the infrared imaging plate (12) facing away from the main mirror body (107). A second gap is left between the infrared imaging plate (12) and the infrared interface plate (14).

3. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 1, characterized in that: The secondary mirror mount (7) has a plurality of third through holes spaced evenly in the circumferential direction. The third through holes are close to the outer edge of the secondary mirror mount (7). A first screw (16) is inserted into the third through hole and is threadedly connected to the main mirror barrel (6).

4. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 1, characterized in that: The secondary mirror mount (7) is fixed to the side of the primary mirror body (107) with two fourth screws (19) and a beam splitter mount (8). The beam splitter mount (8) is coaxially arranged with the secondary mirror mount (7). A second through hole for light to pass through is coaxially opened in the beam splitter mount (8). One end of the beam splitter mount (8) passes into the secondary mirror mount (7) and is bonded to the beam splitter (3). The beam splitter (3) is coaxially arranged with the beam splitter mount (8). The beam splitting surface (301) of the beam splitter (3) faces the primary mirror body (107).

5. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 4, characterized in that: The laser receiving assembly includes a laser receiving focal plane PCB board (9), which is fixed to the beam splitter mount (8) by a plurality of third screws (18). A third gap is left between the laser receiving focal plane PCB board (9) and the beam splitter mount (8). A laser receiving focal plane (4) is provided on the laser receiving focal plane PCB board (9), and the laser receiving focal plane (4) is correspondingly provided with the second through hole.

6. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 1, characterized in that: A second stress unloading groove (105) is provided between the main mirror body (107) and the mounting lug (106). A first stress unloading groove (104) is provided circumferentially on the outer edge of the main mirror body (107). The first stress unloading groove (104) is located on the side of the mounting lug (106) close to the main mirror barrel (6).

7. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 5, characterized in that: A laser receiving focal plane trimming pad (10) is sleeved on the outside of the third screw (18), and the two ends of the laser receiving focal plane trimming pad (10) abut against the beam splitter mount (8) and the laser receiving focal plane PCB board (9), respectively.

8. The lightweight, compact common-aperture infrared / laser ranging integrated camera according to claim 2, characterized in that: The outer side of the sixth screw (21) is fitted with a first pad (13) and an infrared focal plane trimming pad (11). The infrared focal plane trimming pad (11) is located between the infrared imaging plate (12) and the main mirror body (107), and the first pad (13) is located between the infrared imaging plate (12) and the infrared interface plate (14).

Images