Thermal properties of germanium and IR athermal optical design

Steve Bloomberg

doi:10.1117/12.151010

13 August 1993 Thermal properties of germanium and IR athermal optical design

Steve Bloomberg

Proceedings Volume 1971, 8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing; (1993) https://doi.org/10.1117/12.151010
Event: 8th Meeting in Israel on Optical Engineering, 1992, Tel Aviv, Israel

Abstract

Germanium is a material used widely in infra-red optics both in the 3 - 5 micrometers and 8 - 12 micrometers spectral regions. A useful property is its high refractive index, (> 4.0) which helps achieve low aberrations. However, it has several drawbacks, one of which is the relatively large dependence of the refractive index on temperature (dn/dT). This temperature dependence of the refractive index is discussed.

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Steve Bloomberg "Thermal properties of germanium and IR athermal optical design", Proc. SPIE 1971, 8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing, (13 August 1993); https://doi.org/10.1117/12.151010

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