Chiral liquid crystal depolarizer and its preparing method

A technology of chiral liquid crystals and depolarizers, applied in instruments, nonlinear optics, optics, etc., can solve the problems of complex structure and high cost, and achieve the effect of excellent performance, low cost and easy production
CN1749810AInactive Publication Date: 2006-03-22INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
Publication Date
2006-03-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The chiral liquid crystal depolarizer includes two parts of optical transparent material, with wedged or trapezoidal slot array, coated orientation film and chiral liquid crystal self-assembled into crystal characteristic structure. The two parts of optical transparent material are formed into liquid crystal box with wedged or trapezoidal cavity filled with mixture of optically active chiral molecule and birefringent liquid crystal. The chiral liquid crystal depolarizer in single wedge structure includes also spacer for controlling the wedge angle. The chiral liquid crystal depolarizer has the characteristics of both wedged crystal depolarizer and optically active crystal depolarizer, can realize monochromic light depolarization in wide spectral range, and has excellent depolarization to incident polarized light in different angle. The present invention has simple making process and greatly lowered cost, and is especially suitable for depolarization of great caliber light beam.
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Description

technical field

[0001] The invention belongs to the field of devices or devices for controlling light polarization, and in particular relates to a chiral liquid crystal depolarizer and a preparation method thereof. Background technique

[0002] The polarization characteristics of light propagating in media such as optical fiber, the atmosphere or the sea surface will change greatly. How to control or eliminate the influence caused by the change of polarization state is a problem of concern in many technical fields such as strong laser, high-precision spectral radiometry, space optical remote sensing, and optical communication. Scholars in the United States and other countries have done a lot of research on the application of depolarization devices in remote sensors, strong lasers, etc., and have been applied in remote sensors such as CZCS, EAWIFS, MODIS2N, and MERIS.

[0003] At present, the commonly used depolarizer mainly uses crystal dichroism, that is, after the inciden...

Claims

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