An Optical Wavefront Error Improvement System Based on Discrete Pupil Gating

Abstract

An optical wavefront error improvement system based on pupil discrete gating is composed of an optical system main lens, a beam splitter, a wavefront detector, a discrete gating system and a scientific imaging camera, and further comprises a computer. The wavefront detector and the discrete gating system are connected through the computer. The computer is used for controlling the discrete gating system according to wavefront distortion information from the wavefront detector to carry out pupil discrete wavefront gating. Light entering the main lens is splitted into the two parts through the beam splitter; one part of light passes through the wavefront detector and serves as detection wavefront, and a wavefront signal is input to the computer and fed back to the discrete gating system; the other part of light directly enters the discrete gating system, the discrete gating system is used for controlling according to the wavefront signal and the control logic and carrying out the pupil discrete wavefront gating, and finally scientific images are obtained. The pupil discrete wavefront gating is achieved through the discrete gating system, and on the basis of keeping completeness of space frequency, the statistical performance of wavefront errors is improved.

Description

technical field [0001] The invention relates to an optical wavefront error improvement system based on pupil discrete gating, which belongs to the field of high-performance imaging such as active optics and adaptive optics, in particular to an optical wavefront error improvement system controlled by a discrete gating system . Background technique [0002] With the emergence and development of lasers, microelectronics and computers, the function and quality of optical instruments have been significantly developed and improved. But such efforts were limited to improving the internal quality of the instrument. However, in actual astronomical observations, it will be seriously affected by gravity deformation, thermal deformation, and even atmospheric turbulence. Maximizing the spatial resolution of ground-based astronomical optical systems to better observe the shape and structural details of celestial bodies is the dream of astronomers and the goal pursued by astronomical ins...

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Problems solved by technology

[0007] The problem to be solved by this program: to overcome the shortcomings of the existing wavefront corrector in adaptive optics that are too complicated, too expensive, and difficult to obtain, and propose an optical wavefront error improvement system for discrete gating of the pupil, through discrete selection The discrete gating of the wavefront pupil is achieved through the system. On the basis of keeping the spatial frequency as complete as possible, the statistical performance of the wavefront error is effectively improved, and the original wavefront error of the optical system is improved.

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