Dual-imaging method and system based on radial polarization characteristic of vector optical field

Abstract

The invention relates to a dual-imaging method and system based on the radial polarization characteristic of a vector optical field. On the basis of a characteristic that a vector light beam of which the polarization state varies radially is utilized to generate to two focuses with an interval distance therebetween controlled by optical control parameters, a dual-image interval adjustable dual-imaging system is set up. The experimental system of the invention comprises a vector light source, a lens and an image detector; a spatial light modulator can modulate incident light carrying image information, and an optical system is used in cooperation to modulate the incident light in a subsequent stage, and therefore, the vector light beam of which the polarization state varies radially is obtained; the light beam passes through the lens; an image capturing device is utilized to receive spatial modulation light and detect the intensity values of different portions of the spatial modulation light passing through the lens; and therefore, an image of the modulation light is formed in the image capturing device. Double-focusing imaging is a major breakthrough in optical imaging. The dual-imaging method and system of the present invention are designed on the basis of the transmission characteristics of the vector optical field; and the optical parameters that affect the interval of the imaging focuses of the double-focusing imaging can be obtained. The method and system have a bright application prospect.

Description

technical field [0001] The invention relates to the field of imaging of vector light fields, in particular to a dual imaging method and system based on the radial polarization characteristics of vector light fields. Background technique [0002] In the past few years, the unique focusing properties of vector light fields and novel polarization structures have aroused widespread interest. In general, there is only one focal point of the incident beam by setting the phase or intensity (or both) of the spatial light modulator, but the research and application of bifocal imaging are few. The research on bifocal imaging is relatively late, but its application prospect is very promising. By studying the optical parameters that affect it, greater breakthroughs can be made. The invention utilizes the radially changing vector light beam of the polarization state to modulate the bifocal imaging, provides relevant parameters affecting the bifocal imaging, has clear results, and is eas...

AI Technical Summary

Problems solved by technology

In general, there is only one focal point of the incident beam by setting the phase or intensity (or both) of the spatial light modulator, but the research and application of bifocal imaging are few

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