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Method for preparing polymer of electric field tuning/2D optical grating in liquid crystal

A two-dimensional grating and polymer technology, applied in diffraction grating, microlithography exposure equipment, optics, etc., can solve the problems of diffraction efficiency and unadjustable diffraction pattern, and achieve the effect of simple and easy-to-control preparation method

Inactive Publication Date: 2006-02-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Since the grating is formed on the holographic dry plate, its diffraction efficiency and diffraction pattern are not adjustable

Method used

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  • Method for preparing polymer of electric field tuning/2D optical grating in liquid crystal
  • Method for preparing polymer of electric field tuning/2D optical grating in liquid crystal
  • Method for preparing polymer of electric field tuning/2D optical grating in liquid crystal

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Embodiment Construction

[0027] 1) Preparation of the liquid crystal cell: Cut the glass with a thickness of 0.7mm into two ITO glass substrates with a size of 2×2cm, stack them with ITO as the inner surface, and evenly disperse the spacers with 8 micron diameter glass beads between the two substrates. Fix it with AB glue around it, and leave a liquid injection port to make a liquid crystal cell with a gap of 8 microns.

[0028] 2) Preparation of photosensitive monomer and liquid crystal mixture: select photosensitive monomer NPGDA (Beijing Fontes Chemical Material Co., Ltd.) as 64wt% by weight and mix it in nematic liquid crystal TEB30A (Shijiazhuang Lilike Company), and then add 0.5 wt% initiator Rose Bengal (ACROS ORGNICS) and 1 wt% co-initiator N-phenylglycine (ALDRICH CHENICAL COMPANY) in the total amount of both. A total of 3 g of the prepared mixture was prepared. The mixture was heated to the liquid crystal clearing point of 70°C, then removed from the heater, placed on a magnetic stirrer and...

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Abstract

A method for preparing 2D grating of polymer / liquid crystal includes mixing light sensitive monomer with liquid crystal then injecting them in liquid crystal cell with two glass base plates, setting said cell according to designed angle at plate of two ¿C beam laser interference to carry out primary exposure to mixture in cell, rotating cell to be required angle to carry out secondary exposure for obtaining cross and periodic polymer layer surface on two directions to form tunable 2D grating of polymer / liquid crystal , hiving tuning ability on 2D direction by prepared grating under electric field action.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic devices, and relates to the preparation of a polymer / liquid crystal grating, in particular to a preparation method for obtaining an electric field-tuned two-dimensional grating by controlling the phase separation of the polymer / liquid crystal in a two-dimensional direction. Background technique [0002] Traditional grating preparation methods are all manufactured by machining reticles, which puts forward strict requirements on the accuracy, resolution, stability and docking performance of the control system, especially to realize the two-dimensional grating with cross reticles at a specific angle The grating is more difficult; at the same time, due to the fixed slit width and slit distance of the mechanically processed grating, the formed diffraction pattern and spectrum cannot be adjusted, which limits the application in adjustable optical systems. [0003] In order to prepare gratings wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/18G02F1/13G03F7/20
Inventor 宣丽马骥刘永刚宋静胡立发阮圣平
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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