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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 22 — Aug. 1, 2009
  • pp: 4430–4436

Measurement method for the refractive index of thick solid and liquid layers

Branko Šantić, Davor Gracin, and Krunoslav Juraić  »View Author Affiliations


Applied Optics, Vol. 48, Issue 22, pp. 4430-4436 (2009)
http://dx.doi.org/10.1364/AO.48.004430


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Abstract

A simple method is proposed for the refractive index measurement of thick solid and liquid layers. In contrast to interferometric methods, no mirrors are used, and the experimental setup is undemanding and simple. The method is based on the variation of transmission caused by optical interference within the layer as a function of incidence angle. A new equation is derived for the positions of the interference extrema versus incidence angle. Scattering at the surfaces and within the sample, as well as weak absorption, do not play important roles. The method is illustrated by the refractive index measurements of sapphire, window glass, and water.

© 2009 Optical Society of America

OCIS Codes
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.5710) Instrumentation, measurement, and metrology : Refraction

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 6, 2009
Revised Manuscript: July 10, 2009
Manuscript Accepted: July 11, 2009
Published: July 24, 2009

Citation
Branko Šantić, Davor Gracin, and Krunoslav Juraić, "Measurement method for the refractive index of thick solid and liquid layers," Appl. Opt. 48, 4430-4436 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-22-4430


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