A detection method for the imaging quality of the optical system of a large field of view telescope

Abstract

The invention relates to a detecting method for imaging quality of a large-field-of-view telescope optical system, wherein the detecting method comprises the following steps of a first step, calibrating a reference field-of-view; a second step, changing a measuring field-of-view, and adjusting an emergent angle of a parallel light source (1); a third step, positioning a wavefront detector (4), adjusting the position and the attitude of a six-dimensional motion platform (5) according to a positioning closed-loop structure until the wavefront detector (4) and a detected large-field-of-view telescope (6) are in cofocal positions; and a fourth step, detecting the imaging quality, namely obtaining the imaging quality of the detected large-field-of-view telescope (6) according to measured data of the wavefront detector (4) by means of a wavefront reconstruction algorithm; and repeating the second step to the fourth step until detection in a full field-of-view is finished. The detecting method has advantages of settling a problem of detecting imaging quality of the large-field-of-view telescope optical system, overcoming a defect of approximately representing the imaging quality of the full field-of-view through the imaging quality of the central field-of-view, realizing automatic detection for the full field-of-view, and improving detecting accuracy.

Description

technical field [0001] The invention belongs to the technical field of photoelectric telescope detection, and in particular relates to a method for detecting the imaging quality of an optical system of a large field of view telescope. Background technique [0002] Optical telescopes are important scientific equipment for human beings to understand space. Scientists have put forward higher requirements for important indicators such as the aperture, focal length, working band, field of view, and imaging quality of optical telescopes for different observation and research goals. Large field of view optical telescopes can obtain more celestial body information within a certain period of astronomical observation, which improves the efficiency of use, and has always been favored by scientists and astronomical observers. [0003] At present, optical telescopes usually use the Cassegrain or Gregorian system, which has high resolution and the imaging quality reaches the diffraction l...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that existing detection results of the central field of view approximately represent the results of the full field of view in the imaging quality inspection of the current telescope optical system, especially for large field of view telescopes with near-diffraction-limit imaging quality in the entire field of view, the present invention provides A detection method for imaging quality of optical system of large field of view telescope

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