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Detecting method for imaging quality of large-field-of-view telescope optical system

A technology of imaging quality and optical system, which is used in the testing of optical instruments, testing optical performance, testing of machine/structural components, etc., to achieve the effect of improving accuracy and overcoming full-field imaging quality testing

Active Publication Date: 2017-01-11
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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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, es

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  • Detecting method for imaging quality of large-field-of-view telescope optical system
  • Detecting method for imaging quality of large-field-of-view telescope optical system
  • Detecting method for imaging quality of large-field-of-view telescope optical system

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] The detection device that the present invention relates to sees figure 1 , mainly including parallel light source 1 and its two-dimensional motion table 2, wavefront detector 4 and its six-dimensional motion table 5, computer 3, etc., computer 3, two-dimensional motion table 2, six-dimensional motion table 5 and wavefront detector 4 constitutes a control system, and a computer 3, a wavefront detector 4 and a six-dimensional motion table 5 constitute a positioning closed-loop structure.

[0030] figure 1 Among them, the parallel light source 1 adopts an off-axis reflective parallel light source, and is fixedly installed on the working surface of the two-dimensional motion table 2. The two-dimensional motion table 2 has two orthogonal rotation degrees of freedom, namely pitch and tilt, which are used to adjust The light source 1 is inc...

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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...

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/00G01M11/02
Inventor 张俊波张昂
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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