Indicatrix measurement based on birefringence retardation using phase modulation technology

摘要

Abstract: The measurement of 3D anisotropy, which is the measurement of an indicatrix n$-x$/, n$-y$/, n$-z$/ is made by the birefringence measurement with normal and inclined incidence of the light beam. Birefringence retardation contains a fast and a slow axis which are caused by the phase difference of two orthogonal light waves. Information obtained will be different, depending on whether the inclination of a sample is made around the fast axis or the slow axis. Also, depending on the sample to be measured, it is sometimes necessary to incline the sample by changing the azimuthal angle of the sample. Taking into account the recent developments mentioned above, an automatic measuring system of an indicatrix is discussed.!3