Lightweight high-stability space optical camera structure

Abstract

The present application relates to the field of space optical remote sensing technology, and particularly relates to a lightweight high-stability space optical camera structure, which solves the problem that lightweight design of the space optical camera causes insufficient rigidity of the camera structure, and the use of an independent temperature control unit leads to weight increase and difficulty in achieving lightweight of the whole machine. The camera mainly comprises a light shield, a camera main body, an optical-mechanical main body, a heat dissipation plate and an externally attached heat pipe. The M40J resin-based carbon fiber material used in the present application has the advantages of low density, high damping characteristics and modulus, and good thermal stability. By combining the use of resin-based carbon fiber and aluminum alloy plate and other load-bearing structures, the weight of the whole machine can be significantly reduced, while the mechanical stability of the optical camera is ensured, and the optical camera can be widely applied to space cameras with large field of view and high stray light requirements. By reasonably configuring the load-bearing structure and the thermal control components, high temperature control precision of the optical camera can be achieved, thereby improving the dimensional stability of the optical-mechanical structure and further ensuring the imaging quality stability of the optical camera.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of space optical remote sensing technology, and in particular to a light-weight high-stability space optical camera structure. BACKGROUND

[0002] At present, space optical remote sensing technology is developing rapidly and is widely used in earth radiation measurement, atmospheric observation and space environment detection, etc. The requirements for the width, resolution and optical axis stability of optical cameras are becoming higher and higher. At the same time, optical cameras are also developing towards light weight, high integration and high stability.

[0003] Off-axis reflective optical cameras have a large field of view and high imaging quality, which can greatly improve the technical indicators of optical cameras. However, since a large field of view often requires a large size and an open angle of the light shield to be realized, the rigidity and strength design of the light shield is challenging, and the stray light outside the field of view introduced by the large field of view will reduce the transfer function and affect the imaging quality. At the same time, the off-axis reflective optical system is large in size and complex to assemble and adjust, but the weight and size resources of the satellite payload platform are limited.

[0004] In addition, the thermal environment of space optical cameras in orbit is harsh, and the temperature gradient generated by the huge temperature difference will cause the camera structure to displace, affect the position and surface shape of the optical elements, and reduce the imaging quality of the optical camera. SUMMARY

[0005] It is necessary to further design the optical camera structure to be light-weight and integrated while ensuring the mechanical stability. It is necessary to independently control the temperature of the optical camera structure to improve the thermal stability of the structure and ensure the performance of the optical camera. The heat dissipation surface resources of the general satellite platform are limited, and in independent temperature control, the optical camera structure needs to be designed with independent heat dissipation surface, so the camera structure needs to be optimized to provide effective heat dissipation path while ensuring the mechanical stability of the optical camera structure, and at the same time not to occupy the weight resources of the satellite platform.

[0006] In order to solve the problems existing in the prior art, the present application provides a light-weight high-stability space optical camera structure, which has the characteristics of convenient assembly, high integration, light weight, high mechanical and structural thermal stability, effectively improves the stability of the space optical camera in orbit, and saves the installation size, heat dissipation surface and weight resources of the satellite payload platform.

[0007] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0008] A light-weight high-stability space optical camera structure, comprising: a light shield 1, a camera outer frame 2, and a light machine body 3, the light-weight high-stability space optical camera structure further comprising a heat dissipation plate 4 and an outer-pasted heat pipe 5 arranged in the -X plane of the heat dissipation plate 4; the -X plane of the light shield 1 is provided with a -X plane reinforcing rib 103, and a titanium alloy embedded part 102 is bonded on the -X plane reinforcing rib 103 to provide a mounting interface for the heat dissipation plate 4; the heat dissipation plate 4 serves as a force-bearing structure and is fixed with the -X plane of the camera outer frame 2 and the mounting interface of the light shield 1, the light shield 1 is connected with the +Z plane of the camera outer frame 2, and the three are mutually constrained; the light machine body 3 is provided with a scanning mechanism assembly 31, a detector assembly 36, a detector circuit box 37, a high-voltage circuit box 38, and a light machine body frame 39; the scanning mechanism assembly 31 comprises an aluminum-based silicon carbide U-shaped bracket 311 and a scanning mechanism L-shaped heat pipe 314; the evaporation section of the scanning mechanism L-shaped heat pipe 314 is in heat-conducting connection with the aluminum-based silicon carbide U-shaped bracket 311 through a flange, and the condensation section is in heat-conducting connection with the heat dissipation plate 4 through a flange, thereby forming a heat dissipation channel of the scanning mechanism assembly 31; the detector assembly 36 and the light machine body frame 39 are in heat-insulating connection, and the heat generated by the detector assembly 36 can be conducted to the heat dissipation plate 4 through an MCP support 362, an L-shaped heat sink 364, and a detector L-shaped heat pipe 365; the detector circuit box 37 and the high-voltage circuit box 38 are both in heat-conducting connection with the heat dissipation plate 4 through a heat pipe or a direct heat-conducting connection.

[0009] The light shield adopts a light-weight material M40J resin-based carbon fiber. The light shield adopts an inverted conical design for field of view constraint, has a larger field of view angle in the +Y direction, and can realize detection of the edge by using the scanning function of the scanning mechanism.

[0010] The light shield is internally provided with a light-blocking ring and is sprayed with light-excluding black paint, thereby suppressing stray light in the field of view.

[0011] As preferred, the light shield is designed with vertical reinforcing ribs in the X direction, the reinforcing ribs in the -X plane are light-weighted and hollowed out, and provide mounting interfaces for the heat dissipation plate; the reinforcing ribs and the light-blocking ring improve the horizontal and vertical rigidity of the light shield; the side wall and the light-blocking ring of the light shield adopt a variable-thickness design from the fixed end to the free end, thereby enhancing the rigidity and strength of the light shield.

[0012] As preferred, the side wall and the light-blocking ring of the light shield adopt a variable-thickness design from the fixed end to the free end, thereby improving the structural stability of the light shield.

[0013] The camera outer frame comprises an outer frame body, a support, a +Y plate, a -Y plate, a +X plate, and a +Z plate. The outer frame body is of an integrated hollow design, and the six planes are all provided with mounting interfaces.

[0014] The bracket adopts M40J resin-based carbon fiber lightweight material, and is integrally formed by layering and winding after weight reduction and structure optimization design.

[0015] The bracket + Z surface is provided with a threaded hole of a titanium alloy embedded part, which is an installation interface of the outer frame body and the optical machine body, the optical machine body is installed in thermal isolation with the bracket, the +Z plate of the camera outer frame provides an installation surface for the light shield, and the -Y plate of the camera outer frame provides an external installation interface for power supply and communication of the camera.

[0016] The camera outer frame serves to provide support envelopes for the optical machine body and the light shield.

[0017] The optical machine body adopts an off-axis three-mirror optical system.

[0018] The optical machine body comprises a scanning mechanism assembly, an off-axis three-mirror optical assembly, a detector assembly, an optical machine body frame, a detector assembly, a detector circuit box and a high-voltage circuit box.

[0019] The off-axis three-mirror optical assembly comprises telescope, slit, collimating mirror and grating mirror assemblies.

[0020] The off-axis three-mirror optical assembly can be adjusted outside the optical machine body frame, and the inside of the optical machine body frame is sprayed with black paint for eliminating stray light. The mirrors all adopt microcrystalline glass with high thermal stability, and the mirror frames of the mirror assemblies all adopt titanium alloy with high thermal stability, so that the mirrors have good surface shape indexes under the thermal environment in orbit.

[0021] As a preferred embodiment, the optical machine body frame is integrally formed, lightweight design is performed through a weight reduction groove structure, 2A12 hard aluminum material with good thermal and mechanical properties is adopted, the high thermal conductivity of the material reduces the temperature gradient of the structure, reduces the thermal deformation of the optical machine body frame, and ensures the stability of imaging when the optical camera works.

[0022] The scanning mechanism assembly has one-dimensional scanning function and can realize detection of the nadir and the limb along the Y direction.

[0023] The scanning mechanism assembly comprises an aluminum-based silicon carbide U-shaped frame, a motor-driven shaft assembly, a scanning mirror assembly and an L-shaped heat pipe.

[0024] As a preferred embodiment, the scanning mechanism assembly and the optical machine body frame are connected in thermal isolation, and the L-shaped heat pipe is connected to the U-shaped frame and the +X surface of the heat sink through flanges at both ends, so that the scanning mechanism has a good heat dissipation channel. The L-shaped heat pipe has a liquid-absorbing core capillary porous structure filled with liquid, an evaporation section near the scanning mechanism side and a condensation section near the heat sink side.

[0025] As preferred, the aluminum-based silicon carbide has high thermal conductivity, so that the U-shaped frame has good temperature gradient, reduces thermal deformation caused by temperature difference, reduces friction torque caused by thermal deformation, and ensures the driving torque margin of the scanning mechanism.

[0026] The detector assembly comprises an MCP assembly, an MCP support, a voltage division assembly, an L-shaped heat sink, a detector L-shaped heat pipe and a heat collection plate.

[0027] As preferred, the detector assembly is heat-insulatedly connected with the optical machine main body frame. The heat generated by the voltage division assembly and the MCP assembly can be dissipated through the MCP support, the L-shaped heat sink, the heat collection plate and the detector L-shaped heat pipe. This design makes the detector assembly have an independent heat dissipation path, improves the temperature control accuracy of the detector assembly, and ensures the stability of optical imaging of the detector assembly.

[0028] As preferred, the heat sink + X face upper part is sprayed with s781 thermal control white paint to form a cold end, and two external heat pipes are arranged on the +X face, which can improve the heat dissipation efficiency and increase the stiffness of the heat sink and the external heat pipes.

[0029] As preferred, the -X face of the detector circuit box and the high-voltage circuit box is in heat-conducting connection with the heat sink, and the +X face of the detector circuit box and the high-voltage circuit box is in heat-insulated connection with the optical machine main body. The heat generated by the high-power electronic components and the circuit board is transmitted to the circuit box cover plate -X face through the circuit box heat-conducting sheet and the circuit box frame. This heat-conducting path can quickly transmit the heat to the cold end of the heat sink, so that the circuit box has a stable working temperature.

[0030] As preferred, the detector circuit box and the high-voltage circuit box are connected with the optical machine main body and the heat sink in the X direction as a force-bearing structure, which increases the stiffness of the optical camera in the X direction, improves the mechanical stability of the optical camera, and the multifunctionality of the circuit box improves the integration of the whole machine, saving weight resources.

[0031] As preferred, the optical machine main body frame is heat-insulatedly installed with the internal heat source assembly and the camera outer frame, so as to avoid the influence of the internal heat source and the space external heat flow on the temperature of the optical machine main body frame. The optical machine main body frame is pasted with a heating sheet, and high-precision temperature control can be realized by controlling the heating power, so as to reduce the thermal deformation of the optical machine structure and improve the dimensional stability of the camera.

[0032] As preferred, the heat sink is fixed with the -X face of the camera outer frame and the mounting interface of the light shield, and the light shield is connected with the +Z face of the camera outer frame. The three are constrained with each other, which further improves the mechanical stability of the optical camera.

[0033] The beneficial effects of the present application are as follows:

[0034] 1. The application adopts lightweight materials such as carbon fiber and aluminum alloy to significantly reduce the weight of the whole machine, and at the same time, the camera structure is designed to be lightweight and resistant to mechanics, thereby improving the mechanical stability of the camera structure.

[0035] 2. The carbon fiber light shield of the application adopts an inverted conical design to ensure the camera field of view index requirements, so that the camera can have the functions of nadir and edge detection. At the same time, the light shield and the bracket are used in combination to reduce the influence of other reflective surface stray light on the optical performance of the satellite platform.

[0036] 3. The heat dissipation plate of the application is both a camera force-bearing structure and a heat dissipation component, and is constrained by the external heat pipe and the light shield, which can improve the structural stiffness and strength of the three at the same time and also ensure the effectiveness of the heat dissipation component in the independent temperature control of the camera structure.

[0037] 4. The circuit box + X surface of the application is installed in thermal isolation with the optical machine main body, and the -X surface and the heat dissipation plate are installed in thermal conduction, which not only provides a good heat dissipation channel for electronic devices, but also greatly reduces the influence of external heat flow on the optical machine main body. By combining with the heater, the optical camera structure can be guaranteed to have temperature control accuracy. At the same time, the circuit box also serves as a force-bearing structural component to connect the internal optical machine structure and the external heat dissipation plate, further improving the structural stiffness of the optical camera.

[0038] 5. The scanning structure component and the detector component of the application are both heat-generating active components, and the heat is dissipated through independent heat dissipation channels to the heat dissipation plate, without introducing heat into the optical machine main body, thereby effectively dissipating heat while ensuring the temperature control accuracy of the optical machine main body.

[0039] 6. The heat generated by the optical camera is dissipated through the camera body, thereby reducing the burden of the whole satellite heat dissipation.

[0040] 7. The optical machine main body of the application adopts a modular passive component design, which is convenient for optical assembly and adjustment and various optical tests.

[0041] The application optimizes the design of the optical camera structure, increases the multifunctionality of the structural components, improves the integration of the camera structure, and ensures the stability of the optical camera imaging quality while having mechanical stability and thermal stability. The application saves size, weight and heat dissipation resources for the satellite platform, and the structure can be widely applied to various space optical cameras. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1(a) is a schematic diagram of a lightweight high-stability space optical camera structure of the application;

[0043] Figure 1(b) is a schematic diagram of a lightweight high-stability space optical camera structure of the application in an unassembled state;

[0044] Figure 2 is a schematic diagram of the light shield of the application;

[0045] Figure 3 The camera outer frame structure of the present application is shown in the schematic diagram.

[0046] Figure 4 The light path propagation of the off-axis three-mirror optical system of the present application is shown in the schematic diagram.

[0047] Figure 5 The optical-mechanical main body of the present application is shown in the schematic diagram.

[0048] Figure 6 The detector assembly of the present application is shown in the schematic diagram.

[0049] Figure 7 The scanning mechanism assembly of the present application is shown in the schematic diagram.

[0050] Figure 8 The detector circuit box of the present application is shown in the schematic diagram.

[0051] Figure 9 The mounting relationship of the heat dissipation plate of the present application is shown in the schematic diagram.

[0052] Reference signs

[0053] DETAILED DESCRIPTION

[0054] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and examples.

[0055] Figure 1(a) is the structure of the assembled space optical camera, and figure 1(b) is the un-assembled state of the light shield 1, heat dissipation plate 4 and camera outer frame 2. As shown in figure 1, the lightweight high-stability space optical camera structure includes: light shield 1, camera outer frame 2, optical-mechanical main body 3, heat dissipation plate 4 and externally attached heat pipe 5.

[0056] Figure 2 (a) is the first perspective view of the light shield 1, Figure 2 (b) is the second perspective view of the light shield 1. As shown, the light shield 1 includes a light shield mounting flange 101, a titanium alloy embedded part 102, an -X direction reinforcing rib 103, a light blocking ring 104, a +X direction reinforcing rib 105 and a light shield side wall 106. Figure 2

[0057] The light shield 1 is made of M40J resin-based carbon fibre material, which has a low density, good damping characteristics and rigidity, as well as a low thermal conductivity and thermal expansion coefficient, so as to enable the light shield 1 structure to occupy a low weight resource while having good mechanical stability and thermal stability.

[0058] ​The structural members of the light shield 1 are integrally formed by layering and winding, and are fixed by adhesive bonding

[0059] The side wall 106 of the light shield is designed in an inverted conical shape to meet the requirements of the optical camera for detecting the field of view, and a larger light inlet angle is arranged in the +Y direction of the light shield 1 to meet the requirements of the camera for detecting the edge of the earth, and the scanning mechanism assembly 31 can be pushed and scanned in the -Y to +Y direction of the light shield 1.

[0060] The light shield 1 is provided with a light blocking ring 104, and the light blocking ring 104 is arranged in the -Z direction along the light inlet direction and gradually becomes denser, and the light blocking ring is sprayed with a stray light eliminating black paint, and the light blocking ring structure and the stray light eliminating black paint can effectively suppress the stray light outside the field of view entering the light shield.

[0061] The light shield 1 is provided with an -X surface reinforcing rib 103, and a titanium alloy embedded part 102 is bonded and fixed on the -X surface reinforcing rib 103 to provide a mounting interface for the heat sink 4, and the titanium alloy embedded part 102 is threadedly connected with the heat sink 4.

[0062] The -X surface reinforcing rib 103, the +X surface reinforcing rib 105 and the light blocking ring 104 provide transverse and longitudinal support for the side wall 106 of the light shield. The side wall 106 of the light shield is designed in a variable thickness along the +Z direction, and the thickness gradually decreases from the constraint end to the free end. The above technical scheme reduces the weight of the light shield 1 by using lightweight materials and optimizing the structure, improves the stiffness and strength of the light shield 1, and ensures the mechanical stability and thermal stability of the light shield 1.

[0063] As shown in Figure 3 The camera outer frame 2 includes a support 21, an outer frame body 22, a +Y plate 23, a -Y plate 24, a +Z plate 25 and a +X plate 26.

[0064] The support 21 is made of M40J resin-based carbon fiber lightweight material with good mechanical and thermal properties, and further, the support structure is optimized to reduce the weight of the groove and is integrally formed by layering and winding. The layering method is selected according to the mechanical properties, which ensures good structural stability while reducing the weight of the structure, and improves the pointing accuracy of the optical camera.

[0065] The support mounting interface 211 fixes the camera to the satellite platform and is thermally connected with the satellite platform, and the support increases the height of the camera on the satellite platform, and reduces the stray light scattered by the high reflective surface on the satellite platform into the field of view by cooperating with the light shield 1.

[0066] The +Z surface of the support 21 is provided with a second titanium alloy embedded part 212, which is a mounting interface for the outer frame body 22 and the optical machine body 3, and further, the optical machine body 3 is thermally mounted with the support 21.

[0067] The outer frame body 22 features a one-piece, hollowed-out design, ensuring excellent structural stability. Each of the six sides of the outer frame body 22 features mounting interfaces for the five plates and the bracket 21. Furthermore, the -Z surface of the outer frame body 22 connects to the bracket 21, while the -X surface of the outer frame body 22 connects to the heat sink 4. The +Z plate 25 provides a mounting surface for the lens hood mounting flange 101 and provides thermal insulation from the lens hood 1. The -Y plate 24 provides a power and communication interface 241 for the camera, through which all internal cables connect to the outside world.

[0068] The camera frame 2 is used to provide support and envelopment for the optical machine body 3 and the lens hood 1.

[0069] like Figure 4 As shown, the optical machine body 3 adopts an off-axis three-mirror optical system, which has the characteristics of large field of view and high imaging quality.

[0070] like Figure 4 and Figure 5 As shown, the optical machine body 3 includes a scanning mechanism assembly 31, a telescope assembly 32, a slit 33, a collimating mirror assembly 34, a grating assembly 35, a detector assembly 36, a detector circuit box 37, a high-voltage circuit box 38 and an optical machine body frame 39.

[0071] The telescope assembly 32, slit 33, collimator assembly 34 and grating assembly 35 and other reflector components are fixed from the outside to the reserved mounting interface of the optical machine main frame 39 through the installation adapter flange, which is convenient for optical assembly and testing.

[0072] The telescope assembly 32 , the slit 33 , the collimator assembly 34 and the grating assembly 35 are heat-conductingly mounted on the optical machine main frame 39 , and the temperature of the reflector assembly can be indirectly controlled by attaching a heater to the optical machine main frame 39 .

[0073] The reflectors are all made of micro-ceramic glass with a low thermal expansion coefficient. To ensure the surface shape of the reflector, the reflector frame is made of titanium alloy material with a thermal expansion coefficient that matches that of the micro-ceramic glass. As an option, a heater is attached to the back of the reflector assembly to heat and insulate the reflector assembly.

[0074] The main frame 39 of the optical machine is processed in one piece, and the weight-reducing groove is designed for lightweight structure, which not only effectively reduces the weight of the whole machine but also ensures the mechanical stability of the optical machine structure. The main frame 39 of the optical machine adopts 2A12 hard aluminum material with good thermal properties. Its high thermal conductivity reduces the temperature gradient of the main frame 39 of the optical machine, reduces the thermal deformation of the optical machine structure, improves the dimensional stability of the optical system, and ensures the imaging quality when the camera is working.

[0075] The interior of the optical machine main frame 39 is sprayed with black paint to eliminate stray light and suppress stray light entering the optical system.

[0076] As shown in Figure 6 The scanning mechanism assembly 31 includes an aluminum-based silicon carbide U-shaped bracket 311, a scanning mirror assembly 312, a motor-driven shaft assembly 313, and a scanning mechanism L-shaped heat pipe 314.

[0077] The scanning mechanism assembly 31 is installed in thermal isolation with the optical machine main frame 39, reducing the uncontrollable heat generated by the motor from entering the optical machine main frame 39.

[0078] The evaporation section of the scanning mechanism L-shaped heat pipe 314 is connected in thermal conduction with the aluminum-based silicon carbide U-shaped bracket 311 through a flange, and the condensation section is connected in thermal conduction with the heat dissipation plate 4 through a flange and a heat dissipation plate 4, so that the scanning mechanism assembly 31 has a good heat dissipation channel. The inside of the pipe body of the scanning mechanism L-shaped heat pipe 314 is a liquid-filled capillary porous structure, and the pipe body and the flange are integrally formed. The thermal conductivity of aluminum-based silicon carbide is high, which ensures that the aluminum-based silicon carbide U-shaped bracket 311 has a good temperature gradient, reduces the thermal deformation caused by the temperature difference, reduces the friction torque caused by thermal deformation, ensures the driving torque margin of the scanning mechanism, and improves the reliability of the scanning mechanism assembly 31.

[0079] As shown in Figure 7 and Figure 9 The detector assembly 36 includes an MCP assembly 361, an MCP support 362, a voltage divider assembly 363, an L-shaped heat dissipation fin 364, a detector L-shaped heat pipe 365, and a heat collection plate 366.

[0080] The detector assembly 36 is connected in thermal isolation with the optical machine main frame 39. The heat generated by the voltage divider assembly 363 and the MCP assembly 361 can pass through the MCP support 362, the L-shaped heat dissipation fin 364, the heat collection plate 366, and the heat collection plate 366 is connected with the +X surface of the heat dissipation plate 4 through the detector L-shaped heat pipe 365. This technical solution makes the detector assembly have an independent heat dissipation path and does not introduce uncontrollable heat generated by the detector assembly into the optical machine main frame 39, and the heat dissipation path improves the temperature control accuracy of the detector assembly 36, reduces the thermal deformation amount, and ensures the stability of optical imaging.

[0081] The detector assembly 36 can be optically adjusted in the optical machine main frame 39 using a translation stage.

[0082] Figure 8 (a) is a whole view of the detector circuit box 37, Figure 8 (b) is an exploded view of the detector circuit box 37. As shown in Figure 8 The detector circuit box 37 includes a detector circuit box cover plate 371, a detector circuit board 372, a detector circuit box heat dissipation fin 373, a detector circuit box frame 374, a high-power power supply module 375, and a thermal insulation pad 376.

[0083] The detector circuit board 372 and the high-power power module 375 are in heat-conducting connection with the detector circuit box heat-conducting sheet 373, the high-power power module 375 is welded on the circuit board through the via hole of the detector circuit box heat-conducting sheet 373, the heat generated by the detector circuit board 372 and the high-power power module 375 is transmitted to the detector circuit box frame 374, and further transmitted to the detector circuit box cover plate 371. The detector circuit box 37 is in heat-insulating connection with the optical machine main body frame 39 through the heat insulation pad 376.

[0084] As shown in Figure 9 , the +X faces of the detector circuit box 37 and the high-voltage circuit box 38 are installed in heat insulation with the optical machine main body frame 39; the detector circuit box cover plate 371 and the high-voltage circuit box cover plate 381 are connected with the +X face of the heat dissipation plate 4, and the heat of the electronic elements in the circuit box is transmitted to the heat dissipation plate through the circuit box structure. At the same time, the circuit box structure serves as a force-bearing structure to connect the optical machine main body 3 and the heat dissipation plate 4 in the X direction, increases the rigidity of the optical camera in the X direction, and improves the mechanical stability of the optical camera; the technical scheme makes the circuit box have the functions of force bearing and heat conduction, and improves the integration of the whole machine.

[0085] As shown in Figure 9 , the scanning mechanism L-shaped heat pipe 314 serves as the only heat dissipation channel of the scanning mechanism assembly 31, and the heat generated thereby is caused to the heat dissipation plate 4; the heat collection plate 366 and the detector L-shaped heat pipe 365 ensure the heat transmission path of the detector assembly 36 to the heat dissipation plate 4; the detector circuit box 37 and the high-voltage circuit box 38 are in heat-conducting connection with the heat dissipation plate 4 through the respective -X faces; the heat generated by the components with heating devices is uncontrollable, and is caused to the heat dissipation plate 4 through the heat pipe or direct heat-conducting connection for effective heat dissipation; the external heat pipe 5 installed on the -X face of the heat dissipation plate 4 can quickly transmit the heat on the lower side of the heat dissipation plate 4 to the upper cold end, improve the heat dissipation efficiency, and ensure that each heating component has a stable working temperature.

[0086] The optical machine main body frame 39 and the connected heating components are installed in heat insulation, and are connected in heat insulation with the camera outer frame 2, so as to avoid the influence of the internal heat source of the optical camera and the space external heat flow on the temperature of the optical machine main body frame 39, and at the same time, the optical machine main body frame 39 is pasted with a heating sheet for heat preservation, and high temperature control precision of the optical machine main body can be realized by controlling the power of the heating sheet, the thermal deformation of the optical machine structure is reduced, and the stability of the optical camera in the complex temperature environment of outer space is improved.

[0087] Two external heat pipes 5 are arranged on the -X face of the heat dissipation plate 4, which not only ensures the uniformity of heat distribution of the heat dissipation plate and improves the heat dissipation efficiency, but also enhances the lateral rigidity of the heat dissipation plate.

[0088] The heat dissipation plate 4 is installed on the -X surface of the camera outer frame 2 as a force bearing structure, and the upper part of the heat dissipation plate 4 is heat insulation connected with the light shield 1, and the three are mutually constrained, further improving the rigidity of the optical camera in the X direction and ensuring the strength of the whole machine.

[0089] The above technical solution uses the camera parts as a single machine heat dissipation surface to perform independent temperature control, reduces the heat dissipation burden of the whole star while ensuring that the camera has a suitable working temperature, improves the integration and heat dissipation efficiency of the whole machine through structural optimization and layout optimization of the heat dissipation path, and saves weight and size resources for the whole star.

[0090] Finally, it should be explained that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the examples, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A lightweight and highly stable space optical camera structure, comprising: A light shield (1), a camera frame (2), and an optical machine body (3), characterized in that the lightweight and highly stable space optical camera structure further comprises a heat sink (4) and an external heat pipe (5) arranged on the -X surface of the heat sink (4); the -X surface of the light shield (1) is provided with an -X surface reinforcement rib (103), and a titanium alloy embedded part (102) is bonded on the reinforcement rib (103) to provide a mounting interface for the heat sink (4); the heat sink (4) serves as a load-bearing structure and is fixed to the -X surface of the camera frame (2) and the mounting interface of the light shield (1); the light shield (1) is connected to the +Z surface of the camera frame (2), and the three are mutually constrained; The optical machine main body (3) is provided with a scanning mechanism component (31), a detector component (36), a detector circuit box (37), a high-voltage circuit box (38) and an optical machine main body frame (39); the scanning mechanism component (31) includes an aluminum-based silicon carbide U-shaped frame (311) and a scanning mechanism L-shaped heat pipe (314); the evaporation section of the scanning mechanism L-shaped heat pipe (314) is thermally connected to the aluminum-based silicon carbide U-shaped frame (311) through a flange, and the condensation section is thermally connected to the heat sink (4) through a flange, forming a heat dissipation channel of the scanning mechanism component (31); the detector component (36) and the optical machine main body frame (39) are thermally insulated, and the heat generated by the detector component (36) can be thermally conducted to the heat sink (4) through the MCP bracket (362), the L-shaped heat sink (364) and the detector L-shaped heat pipe (365); the detector circuit box (37) and the high-voltage circuit box (38) both conduct heat to the heat sink (4) through a heat pipe or a direct thermal connection; The detector assembly (36) includes an MCP assembly (361), an MCP bracket (362), a pressure divider assembly (363), an L-shaped heat sink (364), a detector L-shaped heat pipe (365), and a heat collection plate (366), wherein the heat generated by the pressure divider assembly (363) and the MCP assembly (361) passes through the MCP bracket (362), the L-shaped heat sink (364) leads to the heat collection plate (366), and the heat collection plate (366) is connected to the +X surface of the heat dissipation plate (4) through the detector L-shaped heat pipe (365).

2. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The light shield (1) further comprises a light shield mounting flange (101), a light blocking ring (104), a +X direction reinforcing rib (105) and a light shield side wall (106); The -X-direction reinforcing ribs (103), the +X-direction reinforcing ribs (105) and the light-blocking ring (104) provide lateral and longitudinal support for the side wall (106) of the light shield; wherein, The side wall (106) of the light shield is in an inverted cone shape, and a plurality of light-blocking rings (104) are arranged inside the light shield (1), and are arranged gradually denser along the -Z direction of incident light. The side wall (106) of the light shield and the light-blocking rings (104) have a progressive thickness along the +Z direction.

3. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The camera outer frame (2) has a bracket (21); the bracket (21) has a bracket mounting interface (211) for fixing the camera on the satellite platform and is thermally insulatedly connected to the satellite platform; the bracket (21) increases the height of the camera on the satellite platform.

4. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The titanium alloy embedded part (102) is threadedly connected to the heat dissipation plate (4).

5. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The material of the sunshade (1) and the bracket (21) includes M40J resin-based carbon fiber, and is integrally wound and formed by ply laying.

6. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The optical machine main frame (39) is integrally formed and has a weight-reducing groove structure, and its material is hard aluminum.

7. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The detector circuit box (37) and the high-voltage circuit box (38) are respectively connected to the optical machine main frame (39) in a heat-insulating manner in the +X direction and are heat-conductively connected to the heat sink (4) in the -X direction.

8. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The optical machine main frame (39) and the internal heating components and the camera outer frame (2) are all heat-insulated. A heating plate is attached to the optical machine main frame (39) for heat preservation, and temperature control is performed by controlling the power of the heating plate.

9. The lightweight and highly stable spatial optical camera structure according to claim 1, characterized in that: The +Z surface of the bracket (21) is provided with a second titanium alloy embedded part (212), which serves as a mounting interface for the outer frame body (22) and the optical machine body (3).

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