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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 25 — Sep. 1, 2002
  • pp: 5275–5281

High-accuracy measurements of the refractive index and its temperature coefficient of calcium fluoride in a wide wavelength range from 138 to 2326 nm

Masahiko Daimon and Akira Masumura  »View Author Affiliations


Applied Optics, Vol. 41, Issue 25, pp. 5275-5281 (2002)
http://dx.doi.org/10.1364/AO.41.005275


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Abstract

The refractive indices of synthetic calcium fluoride for 69 wavelengths from 138 nm in the deep ultraviolet to 2326 nm in the near infrared were measured by the minimum-deviation method in a nitrogen environment. We made these measurements at 20° and 25 °C, respectively, to determine the thermal coefficients of the refractive index over this wide-wavelength region. These refractive indices were fitted to a four-term Sellmeier dispersion formula. The temperature coefficients of the refractive index were fitted to a Hoffman-type dispersion formula. The standard deviation of the residual between the observed values and the calculated values was 0.6 × 10-6 for the refractive index and was 0.13 × 10-6/°C for the temperature coefficient of the refractive index.

© 2002 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(160.4760) Materials : Optical properties
(260.7190) Physical optics : Ultraviolet
(300.6190) Spectroscopy : Spectrometers

History
Original Manuscript: November 14, 2001
Revised Manuscript: April 24, 2002
Published: September 1, 2002

Citation
Masahiko Daimon and Akira Masumura, "High-accuracy measurements of the refractive index and its temperature coefficient of calcium fluoride in a wide wavelength range from 138 to 2326 nm," Appl. Opt. 41, 5275-5281 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-25-5275

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