Bidirectional multi-arch large-caliber space reflector

Abstract

The invention discloses a bidirectional multi-arch large-caliber space reflector, and belongs to the technical field of precision machinery of optical systems. The reflector comprises a reflector surface and a back matrix, wherein open lightweight holes and supporting holes are formed in the back matrix, and the back matrix has a stiffened plate type structure; and grooves are formed in the back matrix, and the back matrix is in a bidirectional multi-arch shape formed by multiple radial arches and multiple annular arches. By adjusting the arrangement of the grooves and changing the mass distribution of the reflector along two directions, the mass of the matrix is lightened under the condition that the stiffness of the structure of the reflector is not reduced, the specific stiffness of the structure is improved, the structure is reasonable, and great lightweight is realized. The specific design examples show that the mass of the reflector can be reduced by 24.5 percent compared with a flat-back reflector. The reflector has the advantages of low self-weight deformation, reasonable stiffness distribution and light mass, and is suitable for a large-caliber space telescope system.

Description

technical field [0001] The invention relates to a two-way multi-arch large-diameter space reflector, which belongs to the technical field of optical system precision machinery. Background technique [0002] The space mirror is a key component in the space optical system, which restricts the sensitivity and resolution of the space optical system. With the continuous improvement of the resolution capability of the space optical system, it is necessary to use a larger-caliber space optical mirror, which will inevitably increase the quality of the optical system, which will directly affect the launch cost and working performance of the optical system. Therefore, the lightweight design of the mirror becomes more and more important. The structural shape design of the reflector is one of the key technologies for lightweight design. At present, the base shapes of large aperture space mirrors mainly include four types: flat back shape, double arch shape, single arch shape and doubl...

AI Technical Summary

Problems solved by technology

Under the existing various support methods, although these traditional mirror structures can obtain better optical performance, their quality is still very large, such as flat-back mirrors, in the case of multi-point back support, The reflector can get a better surface shape, but its mass is generally larger and the specific stiffness of the structure is lower; and for single arch, double arch or double concave reflectors, these forms of reflectors change the mirror body in The mass distribution state in the radial direction reduces a part of the mass and improves the specific stiffness of the structure, but it does not consider the deformation law of the mirror in the circumferential direction, the structural form is still not reasonable, and the specific stiffness of the structure still has a large room for improvement

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