Characterization of uniaxial crystals through the study of fringe patterns

FRANCISCO E. VEIRAS; GERVASIO D. PÉREZ; MARÍA T. GAREA; LILIANA I. PEREZ

Journal of Physics: Conference Series (JPCS)

IOP Publishing

Lugar: Bristol BS1 6BE; Año: 2011 vol. 274 p. 1 - 7

1742-6588

The fringe pattern obtained when a divergent (or convergent) beam goes througha sample of birefringent crystal between two polarizers contains information which is inherent of the crystalline sample under study. On the other hand, by considering the design details of the experience and the parameters that are characteristic of the uniaxial plate, it is possible to theoretically obtain the luminous intensity corresponding to each point on a screen or CCD. Thus, this theoretical model allows us to obtain, from images experimentally obtained and theoretical expressions, the parameters that are characteristic of the plates. The results obtained proved the concordance between theory and experience while endorsing this technique for the characterization of birrefringent crystals and devices based on this type of materials.