Chen Wei-Wei, Pan Jui-Wen, Jeng Shie-Chang
Opt Lett. 2021 Sep 15;46(18):4434-4437. doi: 10.1364/OL.432247.
We demonstrate a circularly polarized optical microscope (POM) by incorporating a hole-patterned electrode (HPE) liquid crystal (LC) lens fabricated by photoalignment. The focal plane is controlled by voltages on the HPE LC lens with a tuning range of 2.2 mm without any mechanical movement. The diopter can be controlled from 0 to -5.0, and the wavefront optical path difference is less than 0.25 for our proposed HPE LC lens. Such a low aberration is obtained, because the LC directors are well aligned along with the axially symmetrical electrical field, and there is no observed twist deformation of the LC directors. Finally, we applied our circularly polarized POM to inspect the reflectance properties of several beetles, and we find that the "Chrysochroa toulgoeti" beetle exhibits right circularly polarized reflectance from some small areas on its wings.
我们通过整合一个由光取向制造的孔图案电极（HPE）液晶（LC）透镜，展示了一种圆偏振光学显微镜（POM）。焦平面由HPE LC透镜上的电压控制，调谐范围为2.2毫米，无需任何机械移动。屈光度可在0至-5.0之间控制，对于我们提出的HPE LC透镜，波前光程差小于0.25。之所以能获得如此低的像差，是因为LC指向矢与轴对称电场良好对齐，且未观察到LC指向矢的扭曲变形。最后，我们将我们的圆偏振POM应用于检查几种甲虫的反射特性，发现“Chrysochroa toulgoeti”甲虫翅膀上的一些小区域呈现右旋圆偏振反射。
