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

Inactive Publication Date: 2006-03-22
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] U.S.Appl.NO.097471 and U.S.Appl.NO.256785 use the method of splitting phase delay to achieve depolarization,

Method used

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  • Chiral liquid crystal depolarizer and its preparing method
  • Chiral liquid crystal depolarizer and its preparing method
  • Chiral liquid crystal depolarizer and its preparing method

Examples

Experimental program
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Embodiment Construction

[0044] The chiral liquid crystal depolarizer of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] figure 1 It is a schematic diagram of the spatial geometric structure (wedge array) of a large aperture chiral liquid crystal depolarizer, (a) is a front view of a chiral liquid crystal depolarizer, and (b) is a top sectional view of a chiral liquid crystal depolarizer.

[0046] In the chiral liquid crystal depolarizer of the present invention, the optically transparent material (1, 2) is made of glass, and the chiral liquid crystal depolarizer is composed of an upper substrate glass and a lower substrate glass having a wedge-shaped groove array; the surface of the wedge-shaped glass is coated with A polyimide solution with a concentration of 4% forms an alignment film (3, 5); the alignment film (3, 5) is rubbed to form a channel, and the liquid crystal molecules are arranged along the channel to form a crystal with an or...

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PUM

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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.

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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Application Information

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IPC IPC(8): G02F1/13
Inventor 张大勇罗飞骆永全刘海涛张宁刘仓理李剑峰
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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