Liquid crystal self-adaption optical system with PD picture processing function

Abstract

The invention belongs to the technical field of self-adaption optical imaging. A picture processing method aiming at phase difference (PD) wavefront reconstruction can be well applied to optical design of a liquid crystal self-adaption optical system, and the system is shown in the picture 1. In an open-loop self-adaption light path with two liquid crystal wavefront correctors, imaging light beams emitted by the two liquid crystal wavefront correctors form a small included angle, an out-of-focus aberration with the PV value being 470 nm is applied to one of the liquid crystal wavefront correctors, and a focal plane picture and an out-of-focus picture of the self-adaption optical system are collected parallelly in different areas of an imaging camera. Since the liquid crystal wavefront correctors can accurately respond to the applied out-of-focus aberration, the PD processing precision of two pictures is very high, the resolution ratio of reconstructed pictures is increased to 35.00 lp / mm from 32.00 lp / mm of a terminal of the liquid crystal self-adaption optical system, and the diffraction limit resolution is 1.08 times that of a two-meter-aperture imaging system.

Description

technical field [0001] The invention belongs to the technical field of adaptive optics imaging, and is an optical design method aimed at a phase difference wavefront reconstruction (PD) image processing method that can be well applied to a liquid crystal adaptive optics system. The optical design involving the parallel imaging of the focal plane and the defocus plane of the liquid crystal adaptive optics system greatly reduces the residual wavefront distortion after adaptive wavefront correction, and is a liquid crystal adaptive optics system with a PD image restoration function. Background technique [0002] Since Galileo first used a telescope to make astronomical observations in 1609, human observation of space objects has made great progress, among which large-aperture optical telescopes are one of the most important observation tools for people. The main performance of an optical telescope includes light-gathering power and resolving power, both of which improve with th...

AI Technical Summary

Problems solved by technology

This focal plane image i f (x,y) and defocused image i d The acquisition method of (x,y) is very suitable for the adaptive optics system based on the deformable mirror wavefront corrector, but it is not the best design for the adaptive optics system based on the liquid crystal wavefront corrector, because in the liquid crystal adaptive optics Two liquid crystal correctors must be used in the system to correct P polarized light and S polarized light respectively to avoid loss of polarized light energy

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