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把具有光敏特性的预聚物与向列相液晶按一定比例混合 ,注入表面经过取向处理的液晶盒中。以紫外灯为光源 ,通过光掩膜法 ,使混合物在光场的引发下发生相分离 ,形成液晶 /聚合物相位光栅。由于相分离后液晶在取向膜的作用下沿液晶盒面方向旋转 180° ,克服了传统液晶光栅器件对入射光偏振方向的依赖 ,提高了光的有效利用率。采用光学显微镜和He Ne激光器进行测试 ,结果表明所制样品具有较好的栅结构 ,其衍射效率不受入射光偏振方向的影响且具有电场可调性。该光栅制作方法简便 ,驱动电压低 ,在光通信器件、衍射光学、投影显示、光开关等领域有广泛的应用前景
The photosensitive prepolymer and nematic liquid crystal are mixed in a certain proportion and injected into the surface of the liquid crystal cell with the orientation treatment. UV light source, through the mask method, so that the mixture in the light field induced phase separation, the formation of liquid crystal / polymer phase grating. Since the liquid crystal is rotated by 180 ° along the liquid crystal cell surface under the action of the alignment film after phase separation, the traditional liquid crystal grating device overcomes the dependence on the polarization direction of incident light and improves the effective utilization of light. The results of optical microscopy and He Ne laser show that the prepared samples have good gate structure, the diffraction efficiency is not affected by the polarization direction of incident light and the electric field is adjustable. The grating has the advantages of simple manufacturing method, low driving voltage and wide application prospect in the fields of optical communication devices, diffraction optics, projection display, optical switch and the like