Lane Connor, Rode David, Rösgen Thomas
Appl Opt. 2021 Sep 20;60(27):8435-8444. doi: 10.1364/AO.433066.
A two-dimensional birefringence measurement method is described. In this procedure, we send light through a rotatable linear polarizer and subsequently through a transparent and birefringent specimen. A polarization camera measures the state of linear polarization from which the relative position of the refractive index axes and the relative phase difference is determined. The measurement range of the phase difference is up to rad, which corresponds to an optical retardation of half the wavelength of the light. The imaging system can measure a large sample area within one measurement cycle. Measurement performance is demonstrated with a quarter-wave plate, and an exemplary test case is shown.
描述了一种二维双折射测量方法。在该过程中，我们使光穿过一个可旋转的线性偏振器，随后穿过一个透明的双折射样本。偏振相机测量线性偏振状态，由此确定折射率轴的相对位置和相对相位差。相位差的测量范围高达 弧度，这对应于光波长一半的光学延迟。成像系统可以在一个测量周期内测量较大的样本区域。用一个四分之一波片展示了测量性能，并给出了一个示例性测试案例。
