The invention discloses a bearing cylinder type main supporting structure of a large off-axis three-mirror space remote sensing camera. The invention relates to the technical field of space optical remote sensing, and solves the problems of low support rigidity and overlarge size envelope of a camera mirror assembly caused by large length-width ratio and large mass of main, third and folding mirrors of a camera due to the characteristics of long focal length and wide field of view of an optical system in the prior art, and the structure comprises a front frame, a rear frame, a main bearing cylinder, a truss rod assembly and a reinforcing rib assembly, the main bearing cylinder is connected with the front frame and the rear frame through screws. The truss rod assembly comprises two truss rods which are symmetrically arranged, the upper end of each truss rod is in positioning connection with the front frame, and the lower end of each truss rod is in positioning connection with the rear frame; the lower end of the reinforcing rib assembly is connected with the main bearing cylinder and the upper end of the reinforcing rib assembly is connected with the front frame through titanium alloy joints; the front frame, the force bearing cylinder, the rear frame and the truss rod joints are all in a plane assembly form, so that the assembly difficulty is greatly reduced, and meanwhile, theproduction period and the manufacturing cost are greatly reduced.

Bearing cylinder type main supporting structure of large off-axis three-mirror space remote sensing camera

The invention discloses an ultra-light stray light eliminating assembly suitable for a coaxial micro-nano remote sensing camera, which relates to the field of space optical remote sensing. The ultra-light stray light eliminating assembly has the characteristics of light weight, simple structure, high stray light eliminating effect and the like, is excellent in mechanical property, and can meet thedual requirements of the micro-nano camera on quality and stray light elimination at the same time. The stray light eliminating assembly comprises a primary mirror light shield, a secondary mirror light shield and a primary force bearing structure. The primary mirror light shield and the secondary mirror light shield are fixedly installed through the primary bearing structure. According to the ultra-light stray light eliminating assembly disclosed in the invention, the coaxial structural form is adopted, the structure is simple, the primary mirror light shield and the secondary mirror light shield are both made of carbon fiber/epoxy composite materials, the advantages of being small in density, high in specific rigidity, high in specific strength, good in machining process, good in size stability, good in fatigue resistance, good in vibration resistance and the like are achieved, and therefore the quality and mechanical property requirements of micro-nano satellites are met.

Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera

The invention provides a movable assembling and adjusting system for a meter-scale aperture optical lens supporting device. The movable assembling and adjusting system comprises a movable rotating device and an adjusting device. The adjusting device is arranged on the upper end face of the movable rotating device, and the movable rotating device is used for driving the adjusting device to rotate.The adjusting device comprises an outer-layer adjusting device and an inner-layer adjusting device. The outer layer adjusting device comprises three lifting adjusting assemblies, and the lifting adjusting assemblies are evenly distributed along the edge of the upper end face of the movable rotating device and used for adjusting the position and posture of the lens supporting device. The inner-layer adjusting device comprises a multi-dimensional adjusting table and a supporting assembly. The supporting assembly is arranged on the table top of the multi-dimensional adjusting table, the multi-dimensional adjusting table is used for adjusting the position and posture of the lens, and the supporting assembly is used for supporting the optical lens. By the adoption of assembling and the adjusting system, independent adjustment of the positions and postures of the lens and the lens supporting device can be achieved, and the risk that the lens surface is scratched can be avoided.

Movable assembling and adjusting system for meter-scale aperture optical lens supporting device

The invention relates to an on-orbit regulation method for a secondary mirror of a space optical remote senor. The on-orbit regulation method comprises the following steps of: after the space opticalremote senor is transmitted to an orbit, detecting an imaging result of the space optical remote senor; analyzing the imaging result to obtain a wave aberration of the space optical remote senor; judging whether the wave aberration of the space optical remote senor meets requirements; if no, after carrying out optical resolving on the wave aberration of the space optical remote senor, according toan optical resolving result, carrying out on-orbit regulation on a position and an attitude of the secondary mirror, until the wave aberration of the space optical remote senor meets the requirements; and if yes, ending regulation on the position and the attitude of the secondary mirror. According to the on-orbit regulation method for the secondary mirror of the space optical remote senor, afterthe imaging result of the space optical remote sensor is analyzed, on-orbit regulation on the position and the attitude of the secondary mirror is regulated, so that a position and attitude error of each optical element in an optical system can be effectively compensated, and on-orbit imaging performance of the large-caliber long-focus off-axis three-mirror optical system can be effectively improved. Moreover, the invention further provides the space optical remote sensor.

On-orbit regulation method for secondary mirror of space optical remote senor and space optical remote senor

The invention discloses a high-precision installation and adjustment method and device for a large-caliber toothed reflector component applied to a space camera. The method comprises the steps that first, a translation tilting table is fixedly connected with a rotary table, and a supporting tool is installed on the translation tilting table; second, a supporting frame is placed on the supporting tool in the first step; third, a reflector is placed on a six-dimensional adjustment table, and meanwhile teeth of the reflector are embedded into tooth slots of the supporting frame; and fourth, glueis injected into each tooth slot of the supporting frame to make the reflector and the supporting frame connected. Through the high-precision installation and adjustment method and device, high-precision micro-stress assembling of the large-caliber toothed reflector component applied to the space camera is realized; and after assembling, the surface shape loss of the reflector is small, the form and location tolerance between the reflector and the supporting structure is small, and the assembled reflector component can meet the requirement that high stability of the surface shape and the formand location is maintained after a vibration test.

High-precision installation and adjustment method and device for large-caliber toothed reflector component applied to space camera

The invention discloses a secondary mirror light shield used for a space large aperture camera. The light shield comprises a louver cover, a cone cover and a bracket. The bracket is a hollow column-shaped frame body, and the louver cover is glued to the outer side of the bracket and used for shielding interference beams between the main mirror and the secondary mirror of the space large aperture camera. The cone cover is glued to the inner side of the bracket and used for shielding and absorbing the diffuse reflection stray light generated by the internal structure of the space large aperturecamera. According to the invention, by gluing the louver cover and the cone cover on both sides of the bracket, the overall structure of the secondary mirror light shield is optimized and the defect that rigidity of the traditional secondary mirror light shield is weak is overcome; and by designing the configuration of the louver cover and the bracket, the shielding ratio of the secondary mirror light shield is reduced, and the problems that the conventional secondary mirror light shield is easily damaged and the processing precision is low are solved.

Secondary mirror light shield used for space large aperture camera

The invention discloses a high rigidity and light space camera lens cylinder and a test method for vibration resistance stability thereof. The cylinder comprises a cylinder body, a main mirror flange,a secondary mirror flange and a reinforcing rib. The cylinder body is a hollow cylinder. One end of the cylinder body is provided with a main mirror flange for connecting a space camera main mirror,and the other end of the cylinder is provided with the secondary mirror flange for connecting the space camera secondary mirror. The outer side of the cylinder body is provided with a reinforcing ribfor reinforcing the structure. The cylinder body, the main mirror flange, the secondary mirror flange and the rib are integrally formed by three-dimensional braiding silicon carbide. According to theinvention, the overall structure of the lens cylinder is optimized by integrally forming the cylinder body, the flanges and the reinforcing rib through using the three-dimensional braiding of siliconcarbide materials, and the defect that the traditional metal support structure is too heavy and has a large self-expansion coefficient is overcome; by designing the vibration resistance stability testmethod of the lens cylinder structure, the stability of the entire lens cylinder is ensured; and the problem of quite poor stability of the conventional resin-based composite material is solved.

High rigidity and light space camera lens cylinder and test method for vibration resistance stability thereof

The invention discloses a discrete space camera secondary lens precision adjusting and fixing method which includes the following steps: connecting a general 5D adjusting mechanism with a secondary lens structure; getting the 3D translation and 2D tilt needed for the adjustment of the secondary lens; using the general 5D adjusting mechanism to adjust the secondary lens; using a filler gauge to getthe gap thickness d1; making a gasket with the gap thickness d1 as a center value; inserting the thin end of the gasket into the gap, and taking the contact position of the gasket and the secondary lens structure as a marking position; with the marking position of the gasket as the center, cutting off a plurality of secondary lens gaskets at a certain interval from the thin end and the thick endrespectively; and selecting a qualified gasket from the secondary lens gaskets, and installing the gasket in the gap between the secondary lens structure and the end face of a lens cone. The problem on 5D precision adjustment of the secondary lens of a space camera and fixation of the secondary lens after adjustment is solved, and the position of the fixed secondary lens can be kept highly stablebefore and after vibration test of the space camera.

Discrete space camera secondary lens precision adjusting and fixing method

The invention discloses a coaxial optical dual-camera splicing structure. According to the scheme, a screw mechanical connection is adopted to enable main support structures of two high-resolution cameras to be fixedly connected together, so that an included angle between optical axes of the two cameras is ensured and splicing of the two cameras is achieved. Through support structures, a dual-camera combination is fixed to a satellite platform, and the problem of thermo-mechanical coupling between the cameras and the satellite platform is solved; and the internal connecting part of the two cameras is provided with a reset pin, and the relative positional relationship between the cameras is ensured at the initial stage of structure assembly by preparing pins. Compared with the prior art, the coaxial optical dual-camera splicing structure is light in weight, good in rigidity and convenient to assembly, the precision and stability of the included angle between the two cameras are high, the stability of an on-orbit geometry is good, large and wide functions are realized at a small cost, and great significance is achieved in realizing the high resolution and wide coverage of space remote sensing cameras.

Gao Chao

Papers

High-precision installation and adjustment method and device for large-caliber toothed reflector component applied to space camera

Secondary mirror light shield used for space large aperture camera

High rigidity and light space camera lens cylinder and test method for vibration resistance stability thereof

Discrete space camera secondary lens precision adjusting and fixing method

Coaxial optical dual-camera splicing structure