Liquid crystal light valve having high contrast and quick response
A fast-response, liquid crystal light valve technology, applied in optics, nonlinear optics, instruments, etc., to achieve the effect of high electro-optical response speed
Inactive Publication Date: 2012-03-21
HEBEI UNIV OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problems of contrast and response time of traditional liquid crystal light valves, and provide a liquid crystal light valve with high contrast and fast response
Method used
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Embodiment Construction
[0028] The manufacturing method of the high-contrast and fast-response liquid crystal light valve of the present invention is made according to the following steps:
[0029] Step 1, etching out electrode patterns.
[0030] First coat the photosensitive adhesive on the ITO conductive glass, and then cover the photoresist mask (the photoresist mask is made on the film with a black and white pattern corresponding to the electrode pattern, and the photoresist in the transparent area is exposed to the action of light when exposed. Under the reaction), and then irradiated by ultraviolet light, the ITO electrode layer is selectively chemically etched, so as to obtain a pattern completely corresponding to the mask on the ITO conductive glass.
[0031] Step 2, coating and curing the alignment layer.
[0032] Coating an alignment agent (polyamic acid solution) on the etched ITO conductive glass to form a uniform film layer. Then pre-baking, heating the solvent in the alignment materia...
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Abstract
The invention belongs to optical switch devices and particularly relates to a liquid crystal light valve having high contrast and quick response. The light valve comprises two polaroids, two biaxial films and a liquid crystal cell, wherein the two polaroids are respectively a polarizer and an analyzer; and the polarizer, the first biaxial film, the liquid crystal cell, the second biaxial film andthe analyzer are sequentially arranged, so that light can sequentially pass through the polarizer, the first biaxial film, the liquid crystal cell, the second biaxial film and the analyzer. The liquid crystal molecules in the thickness direction of a liquid crystal layer have the orientation of up-and-down symmetry in the invention, thus meeting the requirement for response speed; the two biaxialfilms are used for compensating and optimizing the azimuth angles of the compensation film and the polaroids, thus increasing the contrast; and the response time of the liquid crystal light valve reaches 1.5ms, the maximum contrast thereof reaches 2,200, the azimuth angles in horizontal and vertical directions in the area where the contrast is higher than 1,000 are larger than 20 degrees, and those in horizontal and vertical directions in the area where the contrast is higher than 100 are close to 50 degrees.
Description
technical field [0001] The invention belongs to an optical switch device, in particular to a liquid crystal light valve with high contrast and fast response, which is realized by using an optical self-compensating bend (Optical Compensated Bend: OCB) mode liquid crystal cell, two biaxial films and two polarizers Optical switch effect. Background technique [0002] Liquid Crystal Light Valve (LCLV) for short, is a spatial light modulator with real-time function made by utilizing the modulation characteristics of liquid crystal to light. It can be widely used in modern high-tech fields such as optical computing, pattern recognition, information processing, and display, with broad prospects. Since the writing light and the reading light of the liquid crystal light valve are independent of each other, the incoherent light can be easily converted into coherent light, so the liquid crystal light valve is an indispensable device in the coherent light real-time processing system. ...
Claims
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IPC IPC(8): G02F1/13363G02F1/1335G02F1/1333G02F1/139
Inventor 孙玉宝单艾娴
Owner HEBEI UNIV OF TECH