3D printing preparation method of light shield for star sensor with high light absorption capacity

Abstract

The invention provides a 3D printing preparation method for a shading cover for a star sensor with high light absorption capacity, and belongs to the field of stray light suppression for space optical systems. The invention solves the problems of difficult mechanical processing, low dimensional accuracy, damaged vibration test and the like existing in the existing shading cover. Blacken and color the high-performance polymer matrix material of natural color, and use 3D printing technology to carry out integrated rapid prototyping of complex high light-absorbing hoods, effectively avoiding traditional split prototyping. On the basis of ensuring macroscopic dimensional accuracy and mechanical properties, the present invention obtains a rough and porous micro-surface structure by regulating and optimizing 3D printing process parameters. The above-mentioned special texture structure can significantly increase the optical path and provide sufficient internal space for light to pass through Multiple reflections and scattering occur on the concave surface of a single micropit to achieve efficient absorption, which reduces the light reflection on the cavity surface and significantly improves the stray light elimination ability of the light shield, which can meet the requirements of the space star sensor system.

Description

technical field [0001] The invention belongs to the field of stray light suppression in space optical systems, and in particular relates to a 3D printing preparation method for a light shield for a star sensor with high light absorption capacity. Background technique [0002] As a precise attitude measurement device, the star sensor plays a vital role in the flight control of large aircraft, critical space vehicles and other aircraft. Especially for spacecraft with high requirements for attitude pointing and stability, the requirements for star sensor accuracy are more stringent. Since the star sensor works on the earth or interstellar flight orbit, it is inevitably interfered by all or part of the stray light sources such as the sun, the moon, the earth's air light, the outer surface of the spacecraft and the scattering of components, resulting in an increase in the gray level of stray light on the image plane. , the uneven distribution of illumination on the image surface...

AI Technical Summary

Problems solved by technology

However, most of the existing hoods are formed by casting, forging and other methods, and with the development of space technology, the structure of the hood has become more complex and diverse. Generally, it can only be welded after split molding. A series of technical problems such as difficult processing, low dimensional accuracy, and damage to vibration tests

Images