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

A vector light field and imaging system technology, applied in optics, optical components, instruments, etc., can solve the problems of few bifocal imaging research and applications

Inactive Publication Date: 2017-10-13
ZHEJIANG SCI-TECH UNIV
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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

Method used

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

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Embodiment Construction

[0015] Such as figure 2 As shown, a dual imaging system based on a vector light field with radial changes in the polarization state can control the dual image spacing, including: a vector light field generator with radial changes in the polarization state (light source, spatial light modulator A, two Identical lenses (L1 and L2), spatial frequency filter B, two λ / 4 waveplates (E and F), Ronchi phase grating C), thin lens L3; where the final imaging situation of this imaging system passes through the image Detector D is obtained. After the image information is superimposed on the light source, the spatial light modulator A, two identical lenses (L1 and L2), the spatial frequency filter B, two λ4 waveplates (E and F), and the Ronchi phase grating C, namely A vector light field with radial variation of the polarization state modulated with image information is obtained. After the light field is focused by the thin lens L3, two images can be obtained.

[0016] After the incide...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28
CPCG02B27/286
Inventor 陈瑞品张晓雨高腾跃
Owner ZHEJIANG SCI-TECH UNIV
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