Design of 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: 2019-06-25
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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[0037] First, set up on the laboratory optical platform such as figure 2 Shown is a liquid crystal adaptive optics system with PD image processing function and four auxiliary elements to form a closed simulation system to test the effect of the present invention. 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 second liquid crystal wavefront corrector 16, and the CCD camera 18 are all connected to the computer storing the adaptive wavefront correction imaging control software; the axis of the fifth len...
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Abstract
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 involves the parallel imaging of the focal plane and the defocus plane of the liquid crystal adaptive optics system. Through the PD analysis of the two images, the residual wavefront distortion after adaptive wavefront correction is obtained, and the image is reconstructed to achieve a significantly higher resolution. The image resolution is directly acquired by the liquid crystal adaptive optics system. Since the optical path structure of the liquid crystal adaptive optics system is very different from that of the deformable mirror adaptive optics system, the present invention proposes the design of the liquid crystal adaptive optics system with the PD image processing function. Using the imaging beams emitted by two liquid crystal wavefront correctors, and actively applying defocus aberration on one of the correctors, the focal plane image and defocus after adaptive wavefront correction can be obtained simultaneously on different areas of the imaging camera image.
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 can greatly reduce the residual wavefront distortion after adaptive wavefront correction. It is a kind of PD image restoration function in the liquid crystal adaptive optics system. Application Technology. 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 p...
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IPC IPC(8): G02B27/00G02F1/1335
CPCG02B27/0012G02F1/133528G02F1/13355
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