The temperature dependent spectral properties of filter substrate materials in the far-infrared (6-40µm)
G J Hawkins, R Hunneman
Infrared Physics & Technology, Vol 45, Pages 69-79 (2004)
This paper presents the experimental results on the low temperature absorption and dispersion properties for a variety of frequently used infrared filter substrate materials. Index of refraction (n) and transmission spectra are presented for a range of temperatures 300-50 K for the Group IV materials silicon (Si) and germanium (Ge), and Group II-VI materials zinc selenide (ZnSe), zinc sulphide (ZnS) and cadmium telluride (CdTe).