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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 6, Iss. 9 — Sep. 1, 1967
  • pp: 1513–1517

The Thermal Change in the Nondispersive Infrared Refractive Index of Optical Materials

A. Ray Hilton and Charlie E. Jones  »View Author Affiliations


Applied Optics, Vol. 6, Issue 9, pp. 1513-1517 (1967)
http://dx.doi.org/10.1364/AO.6.001513


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Abstract

An apparatus designed and built to measure the infrared refractive index of an optical material as a function of wavelength and temperature is described. The values obtained for the thermal change in refractive index of a Si–As–Te glass, a Ge–Sb–Se glass, As2S2 glass, and Kodak Irtran 4 are presented. Treatment of these data and literature values for other ir optical materials from a molar refraction standpoint, were used to establish an empirical relationship for predicting unknown ΔNT°C values of new optical materials. Measured values range from +300 × 10−5/°C for covalent single crystal germanium to −235 × 10−6/°C for ionic polycrystalline KRS–5.

© 1967 Optical Society of America

History
Original Manuscript: April 17, 1967
Published: September 1, 1967

Citation
A. Ray Hilton and Charlie E. Jones, "The Thermal Change in the Nondispersive Infrared Refractive Index of Optical Materials," Appl. Opt. 6, 1513-1517 (1967)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-6-9-1513

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