White light LCD self-adapting optic system

Abstract

The invention relates to the adaptive optical field, in particular to a liquid crystal adaptive optical system with low energy loss and covering white-light wave band, which adopts an open-loop adaptive light path and substitutes the common polaroid with a PBS beam splitter. The PBS beam splitter splits the incoming ray into two rays of P polarization and S polarization, in which P ray is completely used for the wavefront detection and S ray is completely used for correction and imaging. Before the correction, the S ray is divided into 3 to 4 sub-bands by using color-separation plates; 3 to 4 liquid crystal correctors are correspondingly arranged to perform wavefront correction; the corrected 3 to 4 sub-beams are combined into one imaging beam. The invention uses the PBS beam splitter to substitute the common polaroids, doubling the efficiency of energy utilization in the liquid crystal adaptive optical system. With a plurality of pure-phase liquid crystal wavefront correctors, the invention enables the spectrum of imaging beam can cover white-light wave bands to become the liquid crystal adaptive optical system with efficient utilization of optical energy.

Description

technical field [0001] The invention belongs to the field of adaptive optics, and relates to a combination of optical components such as a liquid crystal wavefront corrector, a wavefront detector, a PBS beam splitter, and a dichroic plate. Liquid crystal adaptive optics system. Background technique [0002] The observation of space flight targets by ground-based telescopes must be carried out through the atmosphere 10-20 kilometers above the ground. Atmospheric turbulence almost always interferes with the propagation of imaging beams. The larger the optical aperture, the greater the distortion of the wavefront in the atmospheric turbulence. Therefore, the efforts to improve the resolution by simply relying on the increase of the telescope aperture have reached the limit, and it has become a consensus that an adaptive optics correction system must be combined. [0003] For space targets, most of them show their geometry by reflecting sunlight, and the strongest band of solar...

AI Technical Summary

Problems solved by technology

However, in the 450nm-800nm ​​band of white light, liquid crystals have strong dispersion, and the shorter the wavelength, the stronger the dispersion, so the center wavelength correction can only be performed in a narrow spectral range, so no liquid crystals with white light bands have been found so far. Literature Report and Disclosure of Adaptive Optics System

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