Plane mirror surface shape detection method, device, equipment and computer-readable storage medium

Abstract

The embodiment of the invention discloses a surface shape detection method, device and equipment for a plane mirror, and a computer readable storage medium. The method comprises the following steps that: segmenting a plane mirror to be detected into a plurality of discrete sub-apertures, and utilizing a Ritchey-Common method to measure the surface shape data of each discrete sub-aperture; according to each piece of surface shape data and the preset shape of each discrete sub-aperture, calculating an ideal point spread function and a practical point spread function under a diffraction limit, combining with the seeing data of a detection environment to calculate standardized point source sensitivity estimation information, and utilizing the estimated standardized point source sensitivity tocarry out global rigid body displacement optimization on each discrete sub-aperture until an optimization cutoff condition is met; and on the basis of the surface shape data of the discrete sub-aperture which meets the optimization cutoff condition, obtaining a characteristic peak value corresponding to each item of a wave surface Zernike polynomial, according to target frequency band information,determining a substrate amount, and taking the substrate amount as the surface shape data of the plane mirror to be detected in the target frequency band to realize the high-efficiency and high-accuracy surface shape splicing detection of the large-caliber plane mirror.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of surface shape detection, and in particular, to a method, device, equipment, and computer-readable storage medium for surface shape detection of a plane mirror. Background technique [0002] Traditional large-aperture telescopes usually use flat mirrors to bend the light path and switch the focus, such as the 8.2m-caliber European Southern Observatory's Very Large Telescope (VLT) with 1.3m×0.8m triple mirrors. With the increase in the complexity of the next-generation large-aperture telescope system, the functional requirements for the reentrant plane mirror also increase accordingly. Based on this situation, the integrated detection technology of the plane mirror should also be refined according to different target frequency bands. [0003] For example, in the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LOMOST) with a diameter of 4m, the MA hexagonal mirror with a diag...

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Problems solved by technology

[0004] Related technologies usually use a plane interferometer to measure the surface shape data of a plane mirror. The measurement of the surface data of a large-diameter plane mirror requires the use of a large-diameter plane interferometer. With the gradual increase in the diameter of the plane mirror, the diameter of the plane interferometer also urgently needs to be matched. , but the cost of a large-aperture plane interferometer is relatively high, resulting in a relatively high cost of surface shape data detection for a large-aperture plane mirror

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