Co-phasing control device and control method for spliced telescope

Abstract

The invention relates to a co-phasing control device and control method for a spliced telescope.The device comprises a spliced telescope body, a first beam splitter, a wavefront detector, a second beam splitter, a translation error detector and a wavefront controller, wherein the first beam splitter receives emergent rays and generates first divided beams and second divided beams; the wavefront detector detects the first divided beams and obtains system aberration data and wavefront distortion aberration data of transmission paths of all spliced sub mirrors; the second beam splitter receives the second divided beams and generates third divided beams and fourth divided beams; the translation error detector detects the third divided beams and collects dispersion interference fringes between each pair of spliced sub mirrors; the wavefront controller is connected with the wavefront detector, the translation error detector and a driver of a secondary separating deformable mirror.By means of the co-phasing control device and control method for the spliced telescope, real-time detection and compensation and correction of translation, inclination and higher order aberration can be effectively achieved, and compared with the technology in a current similar system, better accuracy and instantaneity are achieved.

Description

technical field [0001] The invention relates to a splicing telescope co-phase control device and a control method. Background technique [0002] Using telescopes with high spatial resolution to better observe celestial bodies and the universe is the dream of astronomers and the goal pursued by builders of astronomical instruments. The spatial resolution of a telescope is proportional to its aperture, that is, the larger the aperture, the higher the resolution of the telescope. At present, the construction of single-mirror telescopes over 8 meters has been limited by factors such as manufacturing process and manufacturing cost. If you want to improve the spatial resolution of the telescope, you can use splicing mirror technology to build a larger-caliber telescope, such as the American Thirty Meter (TMT) Telescopes, ground-based Very Large Telescopes (GMTs), etc. all use splicing mirror technology. [0003] Splicing telescopes have great application potential in space remot...

AI Technical Summary

Problems solved by technology

Although this correction device can solve the problem of sign judgment and 2π ambiguity in phase translation error detection, the realization of this correction also needs to calibrate the position of the main peak when the absolute distance is zero, so it will face the same problem as the above-mentioned dispersion fringe method, and The detection range of this method is small

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