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Pulfrich refractometer for 1-D gradients

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Abstract

A refractometer based on the critical angle condition was constructed and found useful for determining 1-D distributions of refractive index. The method is particularly convenient when transient liquids are tested, although it is applicable to solid samples. The device is simple and straightforward in its use, allowing real-time measurements with no additional optical system. The sensitivity can be changed with the size of the apparatus.

© 1988 Optical Society of America

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