Birefringence of sapphire, magnesium fluoride, and quartz in the vacuum ultraviolet, and retardation plates.
Measurements of the birefringence of sapphire, magnesium fluoride, and synthetic quartz from 3000 A to 1500 A are reported and are followed by a discussion of the methods of achromatizing quarter-wave plates and of linearizing the path retardation of a multiwave plate against wavelength (equichromatic wave plates).
Chandrasekharan
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Damany
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