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一种用于大孔径透镜的高双折射液晶。

A high birefringence liquid crystal for lenses with large aperture.

作者信息

Bennis N, Jankowski T, Strzezysz O, Pakuła A, Zografopoulos D C, Perkowski P, Sánchez-Pena J M, López-Higuera J M, Algorri J F

机构信息

Institute of Applied Physics, Military University of Technology, Kaliskiego 2, 00-908, Warsaw, Poland.

Faculty of Mechatronics, Warsaw University of Technology, Św. Andrzeja Boboli 8, 02-525, Warsaw, Poland.

出版信息

Sci Rep. 2022 Aug 26;12(1):14603. doi: 10.1038/s41598-022-18530-z.

DOI:10.1038/s41598-022-18530-z
PMID:36028538
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9418314/
Abstract

This work presents the application of an experimental nematic liquid crystal (LC) mixture (1929) in a large aperture lens. The LC material is composed of terphenyl and biphenyl derivatives compounds with an isothiocyanate terminal group and fluorinated lateral substituents. The substitution with a strongly polar isothiocyanate group and an aromatic rigid core provides [Formula: see text]-electron coupling, providing high birefringence ([Formula: see text] at 636 nm and 23 °C) and low viscosity ([Formula: see text] = 17.03 mPa s). In addition, it also shows high values of birefringence at near infrared (0.318 at 1550 nm). The synthesis process is simple when comparing materials with high melting temperatures. The excellent properties of this LC mixture are demonstrated in a large aperture LC-tunable lens based on a transmission electrode structure. Thanks to the particular characteristics of this mixture, the optical power is high. The high birefringence makes this LC of specific interest for lenses and optical phase modulators and devices, both in the visible and infrared regions.

摘要

这项工作展示了一种实验性向列型液晶（LC）混合物（1929）在大孔径透镜中的应用。该LC材料由具有异硫氰酸酯端基和氟化侧链取代基的三联苯和联苯衍生物化合物组成。用强极性异硫氰酸酯基团和芳香刚性核进行取代提供了π-电子耦合，从而具有高双折射（在636 nm和23 °C时为[公式：见原文]）和低粘度（[公式：见原文] = 17.03 mPa·s）。此外，它在近红外区域（1550 nm处为0.318）也表现出高双折射值。与具有高熔点温度的材料相比，其合成过程简单。这种LC混合物的优异性能在基于透射电极结构的大孔径LC可调谐透镜中得到了证明。由于这种混合物的特殊特性，其光焦度很高。高双折射使得这种LC在可见光和红外区域的透镜、光学相位调制器及器件方面具有特殊的吸引力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7623/9418314/481a1462ced9/41598_2022_18530_Fig14_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7623/9418314/481a1462ced9/41598_2022_18530_Fig14_HTML.jpg

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