Dumitraşcu Leonaş, Dumitraşcu Irina, Dorohoi Dana-Ortansa, Toma Mihai
Faculty of Physics, Al. I. Cuza University, 11 Carol I Bvd., Iaşi -RO-700056, Romania.
Opt Express. 2008 Dec 8;16(25):20884-90. doi: 10.1364/oe.16.020884.
We present a new mathematical technique which can be used to determine the main refractive indices and the birefringence of an anisotropic layer by using a polarizing microscope in conoscopic illumination. The values of the birefringence for the yellow radiation of a Na lamp are determined here for a Carpathian quartz sample, but the technique can also be applied to the study of other uniaxial substances such as liquid crystals, model membranes or biological tissues. The validity of the proposed method was tested by comparing the results with those obtained with a Rayleigh interferometer and by using the technology of channeled spectra.
我们提出了一种新的数学技术，该技术可用于通过在锥光照明下使用偏光显微镜来确定各向异性层的主折射率和双折射。本文确定了喀尔巴阡石英样品对于钠灯黄色辐射的双折射值，但该技术也可应用于研究其他单轴物质，如液晶、模型膜或生物组织。通过将结果与用瑞利干涉仪获得的结果进行比较，并使用通道光谱技术，对所提出方法的有效性进行了测试。
