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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 12, Iss. 3 — Sep. 25, 2008
  • pp: 210–214

Measurement of Refractive Index of Solid Medium by Critical Angle Method When Air Gap is Present

Hwan-Hong Lim, Moon-Soo Kwon, Hee-Joo Choi, Byoung-Joo Kim, and Myoung-Sik Cha  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 12, Issue 3, pp. 210-214 (2008)


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Abstract

A critical angle method was used to measure the index of refraction of a solid medium when an air gap between the prism and the medium is present. The gap effect was analyzed both numerically and experimentally. Since the total internal reflection is severely disturbed by the large gap, determination of the critical angle and the resulting refractive index becomes ambiguous and inaccurate. By using an index matching fluid, we could determine the index of refraction with an uncertainty of <TEX>${\pm}2{\times}1^{-3}$</TEX> even when the gap is as large as 1 <TEX>${\mu}m$</TEX>.

© 2008 Optical Society of Korea

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(260.6970) Physical optics : Total internal reflection

History
Original Manuscript: August 19, 2008
Revised Manuscript: September 10, 2008
Manuscript Accepted: September 11, 2008
Published: September 25, 2008

Citation
Hwan-Hong Lim, Moon-Soo Kwon, Hee-Joo Choi, Byoung-Joo Kim, and Myoung-Sik Cha, "Measurement of Refractive Index of Solid Medium by Critical Angle Method When Air Gap is Present," J. Opt. Soc. Korea 12, 210-214 (2008)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-12-3-210


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