Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1340..203l&link_type=abstract
IN: Cryogenic optical systems and instruments IV; Proceedings of the Meeting, San Diego, CA, July 10-12, 1990 (A92-22851 08-31).
Astronomy and Astrophysics
Astronomy
Background Radiation, Extraterrestrial Radiation, Infrared Radiometers, Infrared Spectrometers, Space Surveillance (Spaceborne), Cryogenic Cooling, Infrared Detectors, Infrared Signatures, Infrared Telescopes, Satellite-Borne Instruments, Shuttle Pallet Satellites, Signature Analysis, Sky Surveys (Astronomy)
Scientific paper
An Ebert-Fastie spectrometer and a filter radiometer for a cryogenically cooled IR-sensor of the Infrared Background Signature Survey experiment are described. The spectrometer covers the spectral range from 2.5 to 22.6 microns with a resolving power of greater than 300 and uses Si:IN, Si:Bi, and Si:As detectors. The radiometer is based on 29 detector elements of different size made from Si:In material. The light is modulated by two tuning fork choppers at 238 Hz, which can be switched on within 0.5 sec. The detector signals are digitized and a digital signal processor performs synchronous rectification and integration for up to 16 channels simultaneously providing amplitude and phase for each detector.
Lange Guenter
Schmidt Ulrich
Sodeikat Dieter W.
Weichs E.
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