Application of multiple-beam white-light fringes for measuring the refraction and dispersion of mica |
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Authors: | S.Y. El-Zaiat |
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Affiliation: | a Physics Department, Faculty of Science, Ain-Shams University Cairo, e-mail: symelzayat@ Egypt |
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Abstract: | Multiple-beam white-light interference fringes are applied to measure the two refractive indices of a mica sample and their dispersion across the visible spectrum. In addition, the mica birefringence and its dispersion are measured. A mica sample of dimensions 2 × 5 mm2 and an immersion liquid of nearly the same refractive index are used. Only a single shot interferogram is needed to measure all the aforementioned parameters. Cauchy's and a modified single-term Sellmeier dispersion formula are used for fitting the experimental data and extracting the parameters required. |
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Keywords: | interferometry fringes mica refraction measurement dispersion measurement |
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