Examinando por Materia "Birrefringencia"
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Publicación Diseño e implementación de un microscopio de luz polarizada para la medición cuantitativa de propiedades polarimétricas en muestras biológicas(Universidad EAFIT, 2018) Cano Barrera, Camilo Antonio; Restrepo Gómez, RenéÍtem Talbot and Lau phenomena implementation via a photorefractive converter(SPIE, 1999-07-06) Tebaldi, Myrian Cristina; Ángel Toro, Luciano; Bolognini, Néstor Alberto; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica AplicadaWe propose a novel implementation of the Lau and Talbot effects. It employs a grating registered as modulation of birefringence in a Bi12SiO20 crystal. The systems proposed allow to control the visibility and in particular to reverse the contrast of the self images and Lau fringes by rotating an analyzer. A theoretical approach is outlined and the predicted behavior is confirmed by results obtained under different experimental conditions. We have taken advantage of the arrangements to demonstrate some applications.