Wavefront correction method and device based on transmission-type liquid crystal space light modulator

Abstract

The invention provides a wavefront correction method and device based on a transmission-type liquid crystal space light modulator, and solves the problem of wavefront correction difficulty of optical elements such as large-caliber telescopes and the like in the prior art. A ZYGO interferometer, a polaroid, the transmission-type liquid crystal space light modulator and a reflecting mirror are in coaxial and sequential arrangement, wherein the ZYGO interferometer is connected with a controller and a data display unit respectively; the ZYGO interferometer, a lens and the reflecting mirror are in coaxial and sequential arrangement; the ZYGO interferometer is connected with the controller and the data display unit respectively; an aperture diaphragm, a light filter, the polaroid, the transmission-type liquid crystal space light modulator, the lens and a CMOS (complementary metal-oxide-semiconductor transistor) sensor are in coaxial and sequential arrangement; the CMOS sensor is connected with a PC (personnel computer) and is used for receiving picture information; the transmission-type liquid crystal space light modulator is connected with a driving circuit, and is used for supplying electricity and transmitting information; the driving circuit is connected with the PC, and is used for displaying a measured phase and grayscale relationship graph of the transmission-type liquid crystal space light modulator onto the transmission-type liquid crystal space light modulator.

Description

technical field [0001] The invention relates to a correction device and method for a wavefront of a liquid crystal spatial light modulator, and belongs to the technical field of optical detection. Background technique [0002] Traditional adaptive optics can correct the distortion of the wavefront by using a wavefront detector to detect the distortion of the wavefront (such as using a Hartmann sensor), and comparing the information given by the sensor with the complete wavefront in the computer , to obtain an ideal imaging system. This technology has been widely used in aerospace, large aircraft, human eye detection, medical and life engineering and other fields. [0003] In recent years, due to the development of liquid crystal display technology and related technologies and the abundance of liquid crystal materials, the use of liquid crystal spatial light modulators instead of deformable mirrors has attracted increasing attention abroad. The liquid crystal spatial light ...

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem of difficult correction of the wavefront of optical elements such as large-aperture telescopes in the prior art, makes the adjustment of the wavefront easy to operate, obtains a clear and complete high-quality optical image, and can reduce the cost while increasing the wavefront. The accuracy of the front correction, a method and device for adjusting the wavefront based on a transmissive liquid crystal light modulator

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