Infrared optical glasses for applications in 8-12-micron thermal imaging systems

Details Infrared optical glasses for applications in 8-12-micron thermal imaging systems Infrared optical glasses for applications in 8-12-micron thermal imaging systems

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apopt..16.2938s&link_type=abstract

Applied Optics, vol. 16, Nov. 1977, p. 2938-2941.

Physics

Optics

7

Glass, Infrared Imagery, Infrared Scanners, Optical Materials, Optical Properties, Refractivity, Thermal Expansion, Arsenic, Germanium, Glass Transition Temperature, Impurities, Selenium

Scientific paper

Measured data are presented on glass transition temperature, thermal expansion coefficient, and refractive index for glasses in the Ge-As-Se system. The range of reciprocal dispersive power between 8 and 12 microns of 110-159 for these glasses is discussed in relation to their basic physical properties, and it is shown that useful compositions for bulk synthesis can be identified. A brief account is given of the preparation techniques, which enable glass to be made with an oxide content of the order of 1 ppm wt as measured by gamma photon activation analysis. The influence of oxide impurity on the transmission is shown for the three glasses Ge20-Se80, As40-Se60, and Ge30-As15-Se55.

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