An Interferometric Angle Measurement System in a Vacuum and Cryogenic Environment

Abstract

An interferometric angle measurement system in a vacuum cryogenic environment, including a corner cube prism assembly, a corner cube prism constant temperature mounting plate, a corner cube prism constant temperature protection cover, an interference mirror group, a laser light source, a laser light source adjustment frame, a laser light source constant temperature box, a laser Light source pressure maintaining tube, system constant temperature support frame; the invention has a stable temperature interface, and at the same time prevents the deep cold background in the vacuum tank from directly radiating to the glass surface. The interference mirror group is installed on the system constant temperature support frame, and the laser light source is installed on the laser light source adjustment frame. After being put into the laser light source constant temperature box, the whole is installed on the system constant temperature support. A laser light source pressure maintaining tube is installed on the surface of the incubator, leading to the outside of the vacuum tank and communicating with the atmosphere. The laser light source is in a constant temperature and constant pressure environment, which meets the requirements of vacuum adaptability testing. It has the advantages of stable temperature, strong applicability, and low cost. It can be realized without customizing the high-precision interferometric goniometer for cryogenic space environment Its measurement function in vacuum cryogenic environment.

Description

technical field [0001] The technology belongs to the field of aerospace testing, and relates to a laser interferometric angle measurement system suitable for a vacuum cryogenic environment. Background technique [0002] A high-precision star sensor generally refers to a star sensor whose attitude measurement accuracy is better than 1 arc second. In recent years, with the increasing application of star sensor technology, high-precision earth observation and astronomical observation, high-precision spacecraft control and other technologies have put forward high-precision requirements for star sensors. [0003] The 0.3″ star sensor is an extremely high-precision star sensor at the world’s advanced level. Accuracy evaluation and testing technology in the ground environment are the key to verify the realization level of this product. In order to realize the high-precision calibration test and accuracy test requirements of this product, it is necessary to Establish a star sensor ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the present invention is: to overcome the technical deficiency that the existing interferometric goniometer cannot be used in the vacuum low temperature environment, a set of interferometric goniometer system applicable to the vacuum cryogenic environment is designed, which solves the problem that the interferometric goniometer cannot Applied to the problem of vacuum and low temperature environment, while ensuring the angle measurement accuracy of the interferometer goniometer

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