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Stray light suppression device for star tracker of spacecraft

A technology of star tracker and suppression device, applied in the field of astronomical navigation, can solve the problems of high reflectivity surface processing difficulty, increasing processing difficulty and the like

Inactive Publication Date: 2010-05-12
武汉华中天经通视科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the processing of high reflectivity surfaces is still a difficult problem
At the same time, the structure of the reflective surface of the first-level cone also increases the difficulty of processing

Method used

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  • Stray light suppression device for star tracker of spacecraft
  • Stray light suppression device for star tracker of spacecraft
  • Stray light suppression device for star tracker of spacecraft

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The invention provides a device for suppressing stray light, which adopts two-stage suppression technology. The suppression device adopts the "invisible" principle, that is, any point in the suppression device is "invisible" to the optical system. The stray light reflected by the suppression device cannot be directly projected to the optical system, and the stray light projected to the suppression device must undergo at least 4 diffuse reflections to reach the exit of the suppression device.

[0022] Such as figure 1 , figure 2 Shown: the stray light suppression device of the present invention is a two-stage suppression, and mainly has three structural parameters: the cone angle W of the inner segment of the suppression device, which is the half-field angle of the detection optical system; the rear cone angle θ of the suppression device, which...

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Abstract

The invention relates to a stray light suppression device for a star tracker of a spacecraft, which comprises a first suppression device and a second suppression device. The first suppression device and the second suppression device are sequentially arranged in the direction of stray light inlet in front of a probing optical system; both the first suppression device and the second suppression device are cylindrical; a plurality of light buffering rings are arranged in both the first suppression device and the second suppression device. The stray light suppression device reduces the interference of various stray lights to the star tracker during probing stars, ensures that the star tracker can perform star probing and star pattern identification, improves star detectivity and the navigation accuracy. In addition, and simultaneously considering that the spacecraft reach the limits of load capacity, material and structure and technology, the stray light suppression device realizes the optimal structural dimension within the allowable dimensional range.

Description

technical field [0001] The invention relates to the field of celestial navigation, in particular to a stray light suppression device for a spacecraft star tracker. Background technique [0002] With the development of aerospace technology, star trackers have gradually become an important part of spacecraft attitude control systems. The star tracker uses infinite stars as the detection target, which has the characteristics of high measurement accuracy and weak target signal. With the development of visible light detection technology, the sensitivity requirements for star trackers are increasing day by day. The design and manufacture of the optical system and detection components have reached the level of optical diffraction, which makes stray light an important factor affecting the performance of star trackers. Therefore, it has become an important link to develop a high-sensitivity star tracker to correctly predict the interference degree of stray light to the star sensor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/36G01C21/02
Inventor 曹宇清毛海岑黄勇
Owner 武汉华中天经通视科技有限公司
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