Abstract

A new technique employing a Soleil-Babinet compensator is described to study the photoelastic behavior of crystals at various wavelengths. The photoelastic dispersion is reported on an isometric crystal, sodium chloride, and a birefringent crystal, barite, for some typical orientations. The values of the stress birefringence obtained at different wavelengths are compared with the values given in the literature. The merits of the present technique over the previous methods are discussed.

© 1970 Optical Society of America

Birefringent Compensator for Studying Very Small Changes in Double Refraction

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