Large dynamic range telescope aberration detection method, device, equipment and medium

Abstract

The invention discloses a large dynamic range telescope aberration detection method, device and equipment and a medium, and the method comprises the steps: introducing a known defocusing amount afterthe calibration in a dome of a telescope, enabling a dislocation type curvature sensor to be located at one side of a focal plane, and obtaining a defocusing image; after the defocusing images are processed, obtaining deviation information of the main focus assembly relative to the main mirror from defocusing star point images in the two defocusing images located on the same side of the focal plane; establishing and training a neural network by taking the low-order aberration measured in each field of view as input and the acquired deviation information of the main focus assembly relative to the main mirror as output; and calculating the low-order aberration of each view field through a neural network, and obtaining the deviation amount corresponding to the main focus assembly. By utilizing the characteristics of small influence of curvature sensing aperture and large dynamic range, the wavefront information is obtained in a large range through simultaneous measurement of different defocused star point images, and the imaging quality of the telescope system is ensured under large disturbance in combination with the strong nonlinear modeling capability of the neural network.

Description

technical field [0001] The invention relates to the technical field of telescopes, in particular to a method, device, equipment and medium for detecting aberrations of telescopes with a large dynamic range. Background technique [0002] 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 fields of view are constantly expanding. Active optics, as the key technology of large aperture and large field of view telescopes, has been widely used. In order to further develop the detection capability of the large-aperture and large-field telescope, the independent and real-time surface correction and attitude control of each main component in the telescope through active optics can not only reduce the requirements for optical processing and system assembly accuracy, but also Effectively relax the rigidity requirements of the large tracking fra...

AI Technical Summary

Problems solved by technology

The environmental changes after the telescope began to observe made the previous adjustments unable to fully function, seriously affecting the working efficiency of the telescope; at the same time, because the process is a transient process, it is difficult to use software simulation and pre-teaching methods

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