Lang Kuo-Chen, Teng Hui-Kang
Appl Opt. 2017 Sep 20;56(27):7718-7725. doi: 10.1364/AO.56.007718.
A heterodyne interferometer is developed to measure the static and temporal behaviors of birefringence of a liquid crystal variable retarder. The interferometer is designed based on the analysis of the polarization state of a coherent wave. Since the optical components of the interferometer are fixed without any adjustment, the phase retardation and the azimuthal angle of a liquid crystal variable retarder is measured independently in real time, where the environmental perturbations and common mode noises can be reduced. From the analysis and experimental demonstrations, the phase retardation can be determined in the [0, 4π] range. Meanwhile, the orientational variation of the azimuthal angle of the optic axis is found.
开发了一种外差干涉仪，用于测量液晶可变延迟器双折射的静态和时间行为。该干涉仪是在对相干波偏振态分析的基础上设计的。由于干涉仪的光学元件是固定的，无需任何调整，因此可以实时独立测量液晶可变延迟器的相位延迟和方位角，从而可以减少环境干扰和共模噪声。通过分析和实验验证，可在[0, 4π]范围内确定相位延迟。同时，还发现了光轴方位角的取向变化。
