Liquid crystal light valve with large visual angle, high contrast and quick response
A high-contrast, fast-response technology, applied in optics, nonlinear optics, instruments, etc., to achieve the effect of high electro-optical response speed
Inactive Publication Date: 2010-09-22
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 viewing angle, contrast and response time of traditional liquid crystal light valves, and provide a liquid crystal light valve with wide viewing angle, high contrast and fast response
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[0028] The high-contrast and fast-response liquid crystal light valve of the present invention is manufactured according to the following steps:
[0029] Step 1, etching out the electrode pattern;
[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, alignment layer coating and curing;
[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 material solution to volatil...
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Abstract
The invention belongs to an optical switch device, in particular to a liquid crystal light valve with a large visual angle, high contrast and quick response, which structurally comprises two polaroids, two +a wave plates, two -c wave plates and a liquid crystal box in the sequence of a polarizer, a first +a wave plate, a first -c wave plate, the liquid crystal box, a second -c wave plate, a second +a wave plate and an analyzer. Light rays sequentially pass through the polarizer, the first +a wave plate, the first -c wave plate, the liquid crystal box, the second -c wave plate, the second +a wave plate and the analyzer. The liquid crystal light valve of the invention uses an optical compensated bend (OCB) mode liquid crystal box, liquid crystal molecules have vertically symmetrical orientations in a thickness direction of a liquid crystal layer, and the liquid crystal box uses the two -c wave plates and the two +a wave plates as compensation films, so the maximum contrast of the liquid crystal light valve reaches 2,900, the contrast in each direction of a 10-degree polar angle range can reach 2,000, the contrast in each direction of a 20-degree polar angle range can reach 1,000, the contrast in a horizontal direction of positive / negative 60-degree polar angle range reaches 200, and response time is 1.7 milliseconds.
Description
Technical field: [0001] The invention belongs to an optical switch device, in particular to a liquid crystal light valve with wide viewing angle, high contrast and fast response, which utilizes an optical self-compensating bend (Optical Compensated Bend: OCB) mode liquid crystal cell, two +a wave plates, two -c wave plate and two polarizers to achieve optical switching 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 c...
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IPC IPC(8): G02F1/13363G02F1/1335G02F1/1333G02F1/139
Inventor 孙玉宝单艾娴
Owner HEBEI UNIV OF TECH