The main refractive indices of calcite crystal are measured by the means of auto-collimation, and the thermo-optical coefficients are calculated. The coefficient expression of Sellmeier equation is obtained by solving Sellmeier equation strictly and the refractive indices of different wavelengths are calculated, which accord with experimental results very well. The measured main refractive indices of calcite at 488-nm wavelength are identical with the values obtained by Sellmeier equation.
© 2007 Chinese Optics Letters
Shuang Zhao, Fuquan Wu, Haifeng Wang, Weigang Zhong, Xiuzhen Li, Hengjing Tang, Meng Shi, and Hongyan Deng, "Accurate measurement of the main refractive indices and thermo-optical coefficients of the calcite crystal," Chin. Opt. Lett. 5, 232-234 (2007)