INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
artículos
Título:
Wide angle conoscopic interference patterns in uniaxial
Autor/es:
FRANCISCO E. VEIRAS; MARÍA T. GAREA; LILIANA I. PEREZ
Revista:
APPLIED OPTICS
Editorial:
OPTICAL SOC AMER
Referencias:
Lugar: Washington; Año: 2012 vol. 51 p. 3081 - 3090
ISSN:
0003-6935
Resumen:
The fringe pattern obtained when a divergent (or convergent) beam goes
through a sample of birefringent crystal between two crossed polarizers
contains information that is inherent to the crystalline sample under
study. The formation of fringe patterns is analyzed from distinct
approaches and with different degrees of approximation considering cones
of light of large numerical aperture. We obtain analytic explicit
formulas of the phase shift on the screen and compare them with the
exact numerical solution. The results obtained are valid for arbitrary
orientation of the optical axis and are not restricted either to low
birefringence or to small angles of incidence. Moreover, they enable the
extraction of the main features related to the characterization of
uniaxial crystal slabs, such as the optical axis tilt angle and the
principal refractive indices.