Device for automatic correcting telescope astigmatic aberration using telescope second lens

Abstract

The device is mainly composed of reflecting telescope system, beam splitter, variable density attenuation disc, high voltage amplifier, CCD camera, data acquisition system, industrial control computer, and software control system based on genetic algorithm. Using secondary mirror of the reflecting telescope being as wave front phase corrector, the invention can adjust alignment between primary mirror and secondary mirror of the reflecting telescope automatically under condition of not introducing additional part of aberrational correction. The invention can corrects static and quasi-static aberration of the reflecting telescope as well as aberration brought by each optical part self in selfadaption. Advantage are: compact structure, simple control, and easy of implementation. The invention reduces system error of reflecting telescope imaging greatly, raises imaging capability of the telescope.

Description

technical field [0001] The invention relates to an adaptive optics device, in particular to a genetic algorithm-based adaptive optics device for correcting telescope aberrations, automatically aligning the telescope system, and improving the imaging capability of the telescope system. Background technique [0002] As one of the most important inventions in astronomy, the telescope has a history of nearly 400 years since it came out in 1609. During this period, the development of the telescope has experienced a major leap. Telescopes can be classified into three types according to the type of objective lens: namely, refracting telescopes, reflecting telescopes, and catadioptric telescopes. But the most used in astronomy is the reflecting telescope, especially the Cassegrain reflecting telescope. Reflecting telescopes use a piece of metal-plated (usually aluminum) concave glass as the primary mirror to receive and focus light. Since the focus is in front of the mirror, a hype...

AI Technical Summary

Problems solved by technology

[0027] The technology of the present invention solves the problem: overcomes the deficiencies of the existing technologies for compensating the static and quasi-static aberrations of the reflective telescope system, and provides a method for automatically correcting the telescope aberration without measuring various static and quasi-static aberrations of the reflective telescope system With this device, there is no need to add aberration compensation devices outside the reflecting telescope, but a deformable mirror is cleverly used as the secondary mirror of the reflecting telescope, which has the advantages of compact system and simple structure, and can automatically compensate the system aberration of the reflecting telescope , can greatly improve the imaging capability of the reflecting telescope

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