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

Abstract

The invention provides a 3D printing preparation method of a lens hood with high light absorption capacity for a star sensor, belongs to the field of stray light restraint of a space optical system, and solves the problems that the existing lens hood is difficult in machining, low in size precision and damaged in vibration test. A high-performance polymer matrix material with the natural color isblackened; and integrated rapid forming is carried out on a complicated high light absorption lens hood through the 3D printing technology, so that traditional split type forming is effectively avoided. On the basis of ensuring the macroscopic size precision and the mechanical property, a coarse and porous micro surface structure is obtained through regulating, controlling and optimizing the technological parameters of 3D printing, the special texture structure can remarkably increase the optical length and provide a sufficient internal space; the light realizes efficient absorption through generating multiple times of reflection and scattering on the concave surface of a single tiny pit, so that light reflection on the surface of a cavity is weakened, the stray light eliminating capacityof the lens hood is remarkably improved, and the using requirements of the space star sensor system can be met.

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

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