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).

DOI: 10.1016/S1350-4495(03)00180-4

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