Large-aperture spliced telescope co-phase method, device and equipment and storage medium

Abstract

The invention discloses a large-aperture spliced telescope co-phase method, device and equipment and a storage medium, and the method comprises the steps: carrying out the star sky imaging through a large-view-field terminal, and obtaining first star point images of different view fields as a reference PSF image; translating the sub-mirror on the outermost ring of the spliced telescope to the maximum range to obtain second star point images of different fields of view as occlusion PSF images; performing Fourier transform on the reference PSF image and the shielded PSF image to obtain an OTF image difference, obtaining wrapping phases of different fields of view, and unwrapping the wrapping phases; and training a neural network by taking the phase information obtained after unwrapping and the conjugate graph thereof as inputs and taking the previous 37-order Zernike polynomial as an output, obtaining wavefront information of different fields of view through the trained neural network, and performing resolving to obtain the actual surface shape of the measured element. In this way, high-resolution wavefront detection data can be obtained by combining the OTF technology with the neural network, and the actual surface shape of the element can be accurately obtained.

Description

Technical field [0001] The invention relate to that technical field of telescopes, in particular to a co-phase method, a device, equipment and a storage medium for a large-aperture splice telescope. technical background [0002] Black hole, dark matter and dark energy, the origin of the universe, the origin of celestial bodies, the origin of cosmic life, etc., are the hot topics in astronomy in recent years. In order to achieve the above scientific objectives, it is a very important technical means to build a large-aperture ground-based telescope to obtain higher light collection area (proportional to aperture square) and resolution (proportional to aperture). [0003] Due to the limitations of manufacturing technology, transportation and cost, the ultimate aperture of single large-aperture telescope is eight meters. For larger-aperture telescopes, synthetic aperture technology needs to be introduced, including synthesizing with smaller-aperture array and realizing the equivalenc...

AI Technical Summary

Problems solved by technology

[0004]Traditional spliced ​​binoculars mostly use Hartmann sensors for wavefront sensing, but due to the limitation of the field of view of the optical system, only one single For wavefront sensing of targets, the number of controllable software is greatly limited, and the number of correcting mirror groups and reflective elements in the next-generation large-aperture telescopes are large

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