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Proceedings Paper

Measurement of the temperature-dependent refractive index and relative photoelastic constant of zinc sulfide
Author(s): David W. Blodgett; Di Yang; Suzanne C. Walts; Michael E. Thomas
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Paper Abstract

High quality measurements of the refractive index of Cleartran Zinc Sulfide at different temperatures over a wide frequency range are reported. The simplest expression of temperature dependence is the derivative of refractive index with respect to temperature, i.e. the thermo-optic coefficient. A convenient method for determining refractive index is measuring constructive or destructive interference between surfaces of a thick lamina that produce transmission peaks. Such transmittance measurements, made at several temperatures, along with knowledge of the sample thickness provide a comprehensive picture of the temperature-dependent refractive index. Results from these measurements show that ZnS has a dn/dT between 3x10-5 and 5.5x10-5 depending on temperature and wavelength. In addition, photoelastic measurements on both thin and thick samples in the visible and mid-IR region show ZnS to have a relative photoelastic constant of about 1.2x10-11m2/N.

Paper Details

Date Published: 7 September 2001
PDF: 11 pages
Proc. SPIE 4375, Window and Dome Technologies and Materials VII, (7 September 2001); doi: 10.1117/12.439179
Show Author Affiliations
David W. Blodgett, The Johns Hopkins Univ. (United States)
Di Yang, The Johns Hopkins Univ. (United States)
Suzanne C. Walts, The Johns Hopkins Univ. (United States)
Michael E. Thomas, The Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 4375:
Window and Dome Technologies and Materials VII
Randal W. Tustison, Editor(s)

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