Ray refraction in uniaxial crystals by Fermat's principle.
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DOI: 10.1364/ao.57.004950
Abstract: Fermat's principle is used to study the refraction of extraordinary rays into and out of uniaxial crystals with arbitrary optic axis orientations. The method produces direct formulas for the direction cosines of the refracted rays… read more here.
Keywords: refraction uniaxial; crystals fermat; fermat principle; uniaxial crystals ... See more keywords