Star sensor light hood

Abstract

The invention discloses a star sensor light hood. The light hood is assembled by an installing cover (1) and a beam limiting cover (2) in a split way. In the installing cover (1), the cutting edge light blocking ring of the butting part of the beam limiting cover (2) is the first cutting edge light blocking ring (4). In the beam limiting cover (2), the cutting edge light blocking ring of the butting part of the installing cover (1) is the second cutting edge light blocking ring (5). The opposite surfaces of the first cutting edge light blocking ring (4) and the second cutting edge light blocking ring (5) are provided with extinction patterns. The extinction patterns of the special structure are additionally arranged on the surface of the key light blocking rings of the conventional light hood so that the suppression effect of the stray light can be enhanced for orders of magnitude without increasing the volume size of the light hood. According to the novel light hood structure, the observation sensitivity and the measurement accuracy of the star sensor can be greatly enhanced without increasing the resource demand.

Description

technical field [0001] The invention relates to the field of stray light suppression of camera systems, in particular to a satellite star sensor shading cover with strict requirements on the suppression of stray light outside the field of view, and in particular to a star sensor shading cover. Background technique [0002] The star sensor achieves the purpose of measuring the attitude of the spacecraft by imaging the stars on the celestial sphere and calculating the transformation matrix of the stars in the camera coordinate system and the earth-centered coordinate system. The imaging object of the star sensor is a star, and the signal strength is weak. In practical applications, it is easily affected by strong light sources such as direct sunlight from the sun or reflected light from the moon and the earth. Therefore, star sensors are basically equipped with hoods, which are used to suppress or eliminate the influence of stray light from the sun, the earth and the moon, and...

AI Technical Summary

Problems solved by technology

In order to reduce the size of the hood, on the basis of the structure design of the traditional hood, it is generally necessary to spray super black paint on the inner wall of the hood to reduce the diffuse reflection of light, or to cool the CCD of the star sensor to enhance the signal and noise of the star point image In contrast, these processes or methods have a good effect on enhancing the performance of the star sensor, but also increase the development difficulty, development cost, and resource requirements of the star sensor.

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