Wavefront curvature sensing method and device for cruising telescope, equipment and medium

A wavefront curvature and sensing method technology, applied in the field of telescopes, can solve the problems of error sensitivity, the decrease in the number of wavefront sensing guide stars, and the impact on the correction ability of closed-loop curvature sensing, so as to reduce the correction time, improve the correction ability, practical effect

Active Publication Date: 2021-03-19
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

However, in order to obtain a larger dynamic range and error sensitivity, the existing curvature sensor mostly chooses a form with a large defocus amount. In this case, the out-of-focus star point images of some c...

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  • Wavefront curvature sensing method and device for cruising telescope, equipment and medium
  • Wavefront curvature sensing method and device for cruising telescope, equipment and medium
  • Wavefront curvature sensing method and device for cruising telescope, equipment and medium

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] The invention provides a method for sensing the wavefront curvature of a survey telescope, such as figure 1 shown, including the following steps:

[0047]S101. After roughly aligning the large-aperture main focus component, imaging is performed through two misaligned sensors located on both sides of the focal plane;

[0048] It should be noted that the present invention realizes the surface correction and attitude control of the main optical elements t...

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Abstract

The invention discloses a wavefront curvature sensing method and device for a cruising telescope, equipment and a medium, and the method comprises the steps: carrying out the coarse alignment of a large-caliber main focus assembly, and imaging through two staggered sensors located at two sides of a focal plane; when the obtained two defocused star point images corresponding to the double natural guide stars are overlapped, simulating to obtain a light intensity distribution diagram of the two defocused star point images; taking the light intensity distribution diagram of the two defocused starpoint images obtained by simulation as a judgment basis, selecting one defocused star point image and discarding the other defocused star point image, or converting the two defocused star point images into a complete defocused star point image; and obtaining wavefront information of the telescope according to the selected defocused star point image or the light intensity distribution of the complete defocused star point image obtained by conversion. Through the method, the correction capability of curvature sensing can be improved, the finally obtained wavefront sensing result is more accurate, the observation precision of the telescope in the deep space field is improved, and the actual requirements are met.

Description

technical field [0001] The invention relates to the technical field of telescopes, in particular to a wavefront curvature sensing method, device, equipment and medium of a survey telescope. Background technique [0002] The increase of the telescope caliber can effectively improve the resolution ability of nearby targets, and at the same time improve the light-gathering ability of the telescope with the square law, improve the signal-to-noise ratio of faint target imaging, and expand the limit detection capability to realize the exploration of a more profound universe. Therefore, large-aperture and large-field telescopes are the key to verifying the latest theories of cosmology and increasing the academic discourse power in the fields of time-domain astronomy in the future. [0003] Large aperture and large field of view telescopes have developed rapidly in recent decades. In order to obtain higher sky survey efficiency and light collection capabilities, their apertures and ...

Claims

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Application Information

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IPC IPC(8): G01M11/02G01J9/00
CPCG01J9/00G01J2009/002G01M11/0242
Inventor 安其昌吴小霞林旭东王建立陈涛李洪文
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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