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Georges, 20th-century French optic inventor. See: Nomarski optics.
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Episcopic DIC is an optical microscopy method in which a modified Wollaston prism, also known as a Nomarski prism, is incorporated into the light path of a microscope to significantly enhance contrast, revealing very fine detail that would otherwise go unseen.
To produce episcopic DIC conditions, an illumination source is polarized by a rotatable filter and directed through the Nomarski prism, where the light is separated into two orthogonally polarized beams.