Paper
13 August 1993 Thermal properties of germanium and IR athermal optical design
Steve Bloomberg
Author Affiliations +
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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Germanium

Refractive index

Aluminum

Optical design

Prisms

Optical engineering

Temperature metrology

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