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Analysis of holographic polymer-dispersed liquid crystals (HPDLCs) for tunable low frequency diffractive optical elements recording

机译:用于可调谐低频衍射光学元件记录的全息聚合物分散液晶(HPDLC)的分析

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Holographic polymer dispersed liquid crystals (HPDLCs) are the result of the optimization of the photopolymer fabrication techniques. They are made by recording in a photopolymerization induced phase separation process (PIPS) in which the liquid crystal molecules diffuse to dark zones in the diffraction grating originated. Thanks to the addition of liquid crystal molecules to the composition, this material has a dynamic behavior by reorientation of the liquid crystal molecules applying an electrical field. In this sense, it is possible to use this material to make dynamic devices. In this work, we study the behavior of this material working in low frequencies with different spatial periods of blazed gratings, a sharp profile whose recording is possible thanks to the addition of a Holoeye LCoS-Pluto spatial light modulator with a resolution of 1920 x 1080 pixels (HD) and a pixel size of 8 x 8 mu m(2). This device allows us to have an accurate and dynamic control of the phase and amplitude of the recording beam. (C) 2018 Elsevier B.V. All rights reserved.
机译:全息聚合物分散液晶(HPDLC)是光聚合物制造技术优化的结果。它们是通过在光聚合引发的相分离过程(PIPS)中进行记录而制成的,在该过程中,液晶分子扩散到起源于衍射光栅的暗区。由于向组合物中添加了液晶分子,该材料通过施加电场使液晶分子重新取向而具有动态行为。从这个意义上讲,可以使用这种材料制造动态设备。在这项工作中,我们研究了这种材料在不同空间周期的闪耀光栅下在低频下工作的行为,由于添加了分辨率为1920 x 1080的Holoeye LCoS-Pluto空间光调制器,因此可以记录清晰的轮廓像素(HD),像素大小为8 x 8微米(2)。该设备使我们能够精确而动态地控制记录光束的相位和幅度。 (C)2018 Elsevier B.V.保留所有权利。

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