Liquid crystal adaptive optics system with pd image processing function
A technology of liquid crystal self-adaption and image processing, applied in optics, optical components, nonlinear optics, etc., can solve problems such as energy loss of polarized light
Active Publication Date: 2019-12-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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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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[0038] First, set up on the laboratory optical platform such as figure 2 The liquid crystal adaptive optics system with PD image processing function shown, and then according to image 3 Four auxiliary elements are shown inserted to form a closed simulation system to test the effect of the present invention. image 3 The "Primary Optical System" inside the middle rectangle is figure 2 The primary optical system of the present invention is shown. The closed simulation system consists of a halogen fiber optic lamp 4, a resolution plate 5, a first lens 6, an atmospheric turbulence simulator 11, a beam splitter 12, a second lens 7, a third lens 8, a wavefront detector 13, a fourth lens 9, A fifth lens 10 , a polarizing beam splitter prism 14 , a first liquid crystal wavefront corrector 15 , a second liquid crystal wavefront corrector 16 , a mirror 17 and a CCD camera 18 are composed. Wherein the wavefront detector 13, the first liquid crystal wavefront corrector 15, the secon...
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Abstract
The invention belongs to the technical field of adaptive optics imaging, and is an optical design aiming at a phase difference wavefront reconstruction (PD) image processing method that can be well applied to a liquid crystal adaptive optics system. In the open-loop adaptive optical path with two liquid crystal wavefront correctors, the imaging beams emitted by the two liquid crystal wavefront correctors contain a small angle, and a defocusing PV value of 470nm is applied to one of the correctors Aberrations, in-focus and out-of-focus images of the adaptive system are acquired in parallel on different regions of the imaging camera. Since the liquid crystal wavefront corrector can accurately respond to the applied defocus aberration, the PD processing accuracy of the two images is very high, and the resolution of the reconstructed image is increased from 32.00lp / mm at the end of the liquid crystal adaptive optics system to 35.00lp / mm mm, which is 1.08 times the diffraction-limited resolution of the 2-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...
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IPC IPC(8): G02F1/13G02B27/10G02B27/09G02B27/28
CPCG02B27/0955G02B27/1006G02B27/283G02F1/1313
Inventor 宣丽杨程亮张佩光李大禹姚丽双徐焕宇曹召良穆全全彭增辉刘永刚张杏云王玉坤王少鑫王启东徐梓浩
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI