Interference method for determination of the refractive index and thickness
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Date
2000-09-01Author
Alexandrov, Sergey
Chernyh, Igor V.
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Alexandrov, Sergey A., & Chernyh, Igor V. (2000). Interference method for determination of the refractive index and thickness. Optical Engineering, 39(9). doi: 10.1117/1.1287583
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Abstract
The interference method for simultaneous measurement of
the absolute refractive index and the thickness of plane parallel samples
is developed. This method enables us to test solid (including optical
glasses, crystals, plastics, and other sheet materials), liquid, and gaseous media over a wide spectral range. The experimental model for the
realization of this method, the laser interference refractometer and thicknessmeter (IRT), is manufactured and investigated. The IRT accuracy of
the refractive index measurement is not worse than that of the best modern goniometers and the accuracy of the thickness measurement corresponds to the interference accuracy