A Novel Liquid Crystal Polarization Modulator and Its Detection Method

A polarization modulator and polarization modulation technology, applied in the method of image detector and image signal processing, measuring the polarization of light, instruments and other directions, can solve the problems of low modulation accuracy and many error sources, and reduce the difficulty of analysis, The effect of reducing the number of error sources, high-precision polarization modulation function
CN112432904BActive Publication Date: 2021-04-23INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
Publication Date
2021-04-23

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Abstract

The invention discloses a novel liquid crystal polarization modulator and a detection method thereof. The novel liquid crystal polarization modulator includes a liquid crystal polarization modulation component, and the liquid crystal polarization modulation component includes a twisted nematic liquid crystal wave plate, an antiparallel nematic liquid crystal wave plate and A linear polarizer, the antiparallel nematic liquid crystal wave plate is arranged between the twisted nematic liquid crystal wave plate and the linear polarizer, the twisted nematic liquid crystal wave plate is located at the front end; the twisted nematic liquid crystal wave plate The alignment directions of the front-end alignment film and the rear-end alignment film of the antiparallel nematic liquid crystal wave plate are all located in the vertical plane of the detection light incident direction; flat. The invention solves the problems of many error sources and low modulation precision in the existing liquid crystal polarization modulation module composed of two nematic liquid crystal adjustable phase retarders and one linear polarizer.
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Description

technical field

[0001] The invention relates to the technical field of polarization imaging, in particular to a novel liquid crystal polarization modulator and a detection method thereof. Background technique

[0002] High-resolution polarization imaging equipment can realize the complementary advantages of polarization imaging technology and light intensity imaging technology, effectively increase the amount of information in optical detection, complete boundary extraction and feature recognition of targets in complex backgrounds, and realize multi-modal information fusion of optical imaging. The "invisible" target becomes "visible" under the ordinary imaging system, which has important application value and broad application prospect in the fields of aerial remote sensing detection, agricultural meteorology and flood emergency monitoring, environmental protection monitoring, criminal evidence identification and target detection.

[0003] At present, the commonly used polar...

Claims

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