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A Hybrid Alignment Dual-frequency Liquid Crystal Polarization Grating

A dual-frequency liquid crystal, polarization grating technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of high driving voltage, light leakage response speed, etc., and achieve the effect of reducing driving voltage, reducing light leakage, and broad application prospects.

Active Publication Date: 2020-12-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid arrangement dual-frequency liquid crystal polarization grating, which solves the problems of high driving voltage, light leakage and slow response speed in the traditional liquid crystal polarization grating

Method used

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  • A Hybrid Alignment Dual-frequency Liquid Crystal Polarization Grating
  • A Hybrid Alignment Dual-frequency Liquid Crystal Polarization Grating
  • A Hybrid Alignment Dual-frequency Liquid Crystal Polarization Grating

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Embodiment Construction

[0033] 1. Preparation of mixed-arrangement dual-frequency liquid crystal polarization grating

[0034] 1) figure 1 It is a mixed-arrangement dual-frequency liquid crystal polarization grating structure, which includes a light-controlled alignment liquid crystal substrate, a vertical alignment liquid crystal substrate and a dual-frequency liquid crystal. ITO conductive film, light control alignment agent, and vertical alignment side liquid crystal substrate include substrate, ITO conductive film, and vertical alignment agent.

[0035] 2) The preparation of the optically controlled alignment liquid crystal substrate, at first the substrate is cleaned, and after drying, an ITO conductive film is evaporated on one side of the substrate with a thickness of about 20nm, and then a photoalignment agent is spin-coated on the ITO conductive film. The thickness is about 80nm, and the photoalignment agent is cured at 230°C, and finally the above substrate is placed on figure 2 Exposure...

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Abstract

The invention discloses a mixed-arrangement dual-frequency liquid crystal polarization grating, which belongs to the technical field of non-mechanical beam deflection in active optoelectronic systems, and mainly aims at light leakage, high driving voltage and poor response in the beam deflection process of current active liquid crystal polarization gratings. The problem of slow speed. The mixed alignment structure mainly includes an optically controlled alignment liquid crystal substrate, a vertical alignment liquid crystal substrate and a dual-frequency liquid crystal, forming a "sandwich" structure. The invention prepares the liquid crystal polarization grating through the optical control alignment technology and the vertical alignment technology, which can realize the beam deflection with ultra-high diffraction efficiency; the Fredericks transition threshold can be eliminated and the driving voltage can be reduced by using the mixed arrangement structure; the dual-frequency liquid crystal can greatly improve the The phase modulation amount of the mixed arrangement structure reaches sub-millisecond response speed.

Description

technical field [0001] The invention belongs to the technical field of non-mechanical light beam deflection in active photoelectric systems, and specifically refers to a mixed-arrangement dual-frequency liquid crystal polarization grating. Background technique [0002] In the active optoelectronic system, the deflection and scanning device of the laser beam is a core component, such as the precise control of the deflection angle of the laser beam by the antenna in the laser communication system, and the control of the coherent combined laser beam by the aimer in the laser weapon system, etc. According to the classification of the working carrier, the beam deflection system can be mainly divided into mechanical beam deflection system and non-mechanical beam deflection system. The non-mechanical beam deflection system has the advantages of small size, light weight, low power consumption, high sensitivity, and programmable agile control. , no inertial effect and other obvious a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337G02F1/137G02F1/29
CPCG02F1/1337G02F1/133788G02F1/137G02F1/29
Inventor 王启东穆全全刘永刚李松振彭增辉姚丽双赵志伟王承邈鲁兴海曹召良宣丽李大禹杨程亮张佩光徐焕宇张杏云
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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