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

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 ...

AI Technical Summary

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 closer stars will overlap. , this phenomenon will lead to a rapid decline in the number of guide stars available for wavefront sensing, which in turn will affect the correction capability of closed-loop curvature sensing

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