A small off-axis three-reverse ionospheric imager frame device
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An off-axis three-mirror and ionospheric technology, which is applied in the field of space optical remote sensing, can solve the problems of cumbersome design process of main bearing cylinder, complicated optical assembly and adjustment of mirror components, and large envelope size of truss rod type, and achieves the structural space The effect of high utilization rate, improved space utilization rate and high specific stiffness
Active Publication Date: 2021-06-01
NAT SPACE SCI CENT CAS
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The large envelope size of the truss rod type is not conducive to mass production, the design process of the main load-bearing cylinder is cumbersome, the optical adjustment of the mirror assembly is complicated, the traditional frame structure has low specific stiffness, and the space utilization rate is small
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[0035] The present invention will be further described below in conjunction with specific examples.
[0036] Such as Figure 1-12 As shown, the frame structure of the off-axis three-mirror ionospheric imager includes: off-axis three-mirror assembly (secondary mirror 1, primary mirror 7, third mirror 9), main frame 2, shading tube I3, rear cover 4, T Type slit structure 5, stray light elimination trap 6, truss rod 8, shading tube II 10, detector aperture 11, detector assembly 12, front cover 13.
[0037] The main frame 1 includes a light inlet plate 201 integrally cast, a primary mirror substrate 215, a secondary mirror substrate 205, a third mirror substrate 211, a detector substrate 207, a top plate 217, a bottom plate 209, a support plate I 202, a support plate II 206, Light baffle III 203 , light baffle I 213 , light baffle II 216 and truss rod mounting feet 210 .
[0038] The main mirror substrate 215, the secondary mirror substrate 205 and the third mirror substrate 211...
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Abstract
The invention relates to the technical field of space optical remote sensors, in particular to a frame structure of a small off-axis three-counter-ionospheric imager, which solves the problem of low rigidity of the frame structure caused by the large aspect ratio of the structure caused by the long focal length and wide field of view of the optical system. Insufficient stray light suppression mainly includes the front cover, rear cover, off-axis three-mirror assembly, main frame, detector assembly, T-shaped slit structure, truss rod, stray light elimination trap, light shielding tube I, light shielding Cylinder II and detector aperture. The off-axis three-mirror assembly includes a primary mirror assembly, a secondary mirror assembly, and a three-mirror assembly; the main frame includes a light entrance plate, a primary mirror substrate, a secondary mirror substrate, a three-mirror substrate, a detector substrate, a top plate, and a bottom plate , the supporting plate I, the supporting plate II, the light blocking plate I, the light blocking plate II, and the light blocking plate III. The invention has high structural space utilization rate and high specific rigidity, can suppress the stray light of the off-axis three-mirror system in the whole path, and effectively improve the imaging quality of the optical system.
Description
technical field [0001] The invention relates to the technical field of space optical remote sensing, in particular to a frame structure of a small off-axis three-counter ionospheric imager, which has high space utilization, high specific stiffness, and can effectively suppress stray light in all optical paths. Background technique [0002] The earth's ionosphere is an important place for the operation of near-Earth satellites and space stations, and the safety of space vehicles can be effectively guaranteed by monitoring the characteristic parameters of the ionosphere. The ionospheric imager is a scientific instrument used to monitor the characteristic parameters of the ionosphere. It obtains the space environment parameters of the ionosphere by measuring the far ultraviolet radiation. [0003] The off-axis three-mirror optical system is widely used in the field of space optical remote sensing due to its advantages of large field of view and high resolution. Since the off-a...
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