![]() The term birefringence is sometimes also used as a quantity (see below), usually defined as the difference between extraordinary and ordinary refractive index at a certain optical wavelength. How to cite the article suggest additional literatureīirefringence is the property of some transparent optical materials that the refractive index depends on the polarization direction – which is defined as the direction of the electric field.įor example, it is observed for crystalline quartz, calcite, sapphire and ruby, also in nonlinear crystal materials like LiNbO 3, LBO and KTP. ![]() Using our ad package, you can display your logo and further below your product description.ĭefinition: the polarization dependence of the refractive index of a medium
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