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Proceedings Paper

Cryogenic refractive indices of cadmium telluride coatings in wavelength range from 2.5 to 20 um
Author(s): Weiting Feng; Yixun Yen; Cui Yuan Zhu
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Paper Abstract

A sample of cadmium telluride coating was formed onto a germanium substrate by thermal evaporation. The optical constants were measured by a modification of the envelope method in which only data from transmission spectrum are used and the procedure is simple. Accuracies are about one part in the third decimal place with the technique. The sample was mounted in a vacuum chamber and its optical constants were measured as a function of wavelength, from 2.5 - 20micrometers , at four fixed temperatures. Results in the form of refractive index versus temperature and wavelength are presented, as well as values of dn/dT as a function of wavelength and temperature.

Paper Details

Date Published: 1 November 1991
PDF: 7 pages
Proc. SPIE 1535, Passive Materials for Optical Elements, (1 November 1991); doi: 10.1117/12.48319
Show Author Affiliations
Weiting Feng, Shanghai Institute of Mechanical Engineering (China)
Yixun Yen, Shanghai Institute of Technical Physics (China)
Cui Yuan Zhu, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 1535:
Passive Materials for Optical Elements
Gary W. Wilkerson, Editor(s)

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