Absorbing coatings and diffuse reflectors for the Herschel platform sub-millimeter spectrometers HIFI and PACS

Author

Klaassen, Tjeerd O. ; Blok, John H. ; Hovenier, J. Niels ; Jakob, Gerd ; Rosenthal, Dirk ; Wildeman, Klaas J.

Author_Institution

Dept. of Imaging Sci. & Technol., Delft Univ. of Technol., Netherlands

fYear

2002

fDate

2002

Firstpage

32

Lastpage

35

Abstract

Absorbing coatings for the HIFI and PACS spectrometers aboard the Herschel platform have been developed and optically characterized. Using radiation from an optically pumped far-infrared laser at wavelengths in the 90-900 μm range, the specular as well as the diffuse reflection - described by the bi-directional reflection distribution function - have been determined. The influence of polarization has been addressed too. Moreover, the absorption of non-absorbing diffusely reflecting surfaces, to be used for integrating spheres, has been determined using a calorimetric method.

Keywords

aerospace instrumentation; coatings; electromagnetic wave absorption; electromagnetic wave reflection; rough surfaces; submillimetre wave spectroscopy; HIM; Herschel platform; PACS; absorbing coatings; bi-directional reflection distribution function; calorimetric method; diffuse reflectors; far-infrared laser; integrating spheres; nonabsorbing diffusely reflecting surfaces; optically pumped FIR laser; polarization; submillimeter spectrometers; Bidirectional control; Coatings; Distribution functions; Laser excitation; Optical polarization; Optical pumping; Optical reflection; Picture archiving and communication systems; Pump lasers; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Terahertz Electronics Proceedings, 2002. IEEE Tenth International Conference on

Print_ISBN

0-7803-7630-7

Type

conf

DOI

10.1109/THZ.2002.1037582

Filename

1037582