The bireflectance effect is observed when a light beam is internally reflected in an anisotropic material. Generally, an unpolarized light beam splits into four beams on reflection. A new method for simultaneous measurement of the three refractive indices, based on laser-beam splitting due to bireflectance, is demonstrated in the biaxial CdWO4 crystal. The three principal refractive indices of CdWO4 were obtained in the visible range. At λ = 633 nm, nX = 2.09 ± 0.01, nY − nX = 0.052 ± 0.001, and nZ − nX = 0.114 ± 0.002.
© 1987 Optical Society of America
Original Manuscript: March 10, 1987
Manuscript Accepted: May 21, 1987
Published: August 1, 1987
Haim Lotem and Zeev Burshtein, "Method for complete determination of a refractive-index tensor by bireflectance: application to CdWO4," Opt. Lett. 12, 561-563 (1987)