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Proceedings Paper

Interferometric measurements of thermo-optic coefficients of ZnS, CaF2, and Ge in the infrared
Author(s): Jacques Mangin; Pierre Strimer; Marc Schillinger; Jean-Louis P. Meyzonnette; Jacques Thebault; C. Aymonier
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Paper Abstract

The thermo-optic coefficient (delta) n divided by (delta) T of CaF2, ZnS and Ge single crystals have been measured in the infrared from 20 degrees C to 100 degrees C. The laser interferometric method employed allows a determination of (delta) n divided by (delta) T with an accuracy close to 10-6K-1 in the case of nonabsorbing materials. For Ge the uncertainty is increased by a factor of 3 and is mainly due to its increasing absorption coefficient with temperature. The behavior of ZnS was examined at 1.06 micrometers and 10.6 micrometers laser radiations; CaF2 and Ge were investigated respectively at 1.06 micrometers and 10.6 micrometers.

Paper Details

Date Published: 19 August 1996
PDF: 7 pages
Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); doi: 10.1117/12.246739
Show Author Affiliations
Jacques Mangin, Univ. de Bourgogne (France)
Pierre Strimer, Univ. de Bourgogne (France)
Marc Schillinger, Spacebel Instruments SA (Belgium)
Jean-Louis P. Meyzonnette, Institut d'Optique Theorique et Appliquee (France)
Jacques Thebault, Sfim ODS (France)
C. Aymonier, Univ. de Bourgogne (France)


Published in SPIE Proceedings Vol. 2775:
Specification, Production, and Testing of Optical Components and Systems
Anthony E. Gee; Jean-Francois Houee, Editor(s)

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