Spectrometer/radiometer for measurement of infrared signatures from space

Guenter Lange; E. Weichs; Ulrich Schmidt; Dieter Werner Sodeikat

doi:10.1117/12.23047

1 November 1990 Spectrometer/radiometer for measurement of infrared signatures from space

Guenter Lange, E. Weichs, Ulrich Schmidt, Dieter Werner Sodeikat

Proceedings Volume 1340, Cryogenic Optical Systems and Instruments IV; (1990) https://doi.org/10.1117/12.23047
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Guenter Lange, E. Weichs, Ulrich Schmidt, and Dieter Werner Sodeikat "Spectrometer/radiometer for measurement of infrared signatures from space", Proc. SPIE 1340, Cryogenic Optical Systems and Instruments IV, (1 November 1990); https://doi.org/10.1117/12.23047

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