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2 August 2010 Determination of refractive index of transparent plate by Fabry-Perot fringe analysis
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Abstract
We developed a simple and accurate method for measuring the refractive indices of transparent plates by analyzing the transmitted fringe pattern as a function of angle of incidence. By using two different wavelengths, we resolved the 2π- ambiguity inherent to the phase measurement involving a thick medium, leading to independent determination of the absolute index of refraction and the thickness with a relative uncertainty smaller than 10-5 for a 1 mm-thick fused silica plate. The accuracy of our method was confirmed with a standard reference material.
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Hee Joo Choi, Hwan Hong Lim, Han Seb Moon, Tae Bong Eom, Jung J. Ju, and Myoungsik Cha "Determination of refractive index of transparent plate by Fabry-Perot fringe analysis", Proc. SPIE 7790, Interferometry XV: Techniques and Analysis, 77900Z (2 August 2010); https://doi.org/10.1117/12.862363
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