Other
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...74...27l&link_type=abstract
Space Science Reviews, Volume 74, Issue 1-2, pp. 27-36
Other
2
Space Instrumentation, Visible And Infrared Diffuse Backgrounds
Scientific paper
The temperature and emissivity of infrared and submillimeter telescopes are basic parameters that drive the optical and thermal design of astronomical space projects. They determine also, among other parameters, the self-emission of the instrument and the photon noise produced by this radiation on the detectors. By comparing the telescope brightness with that of the sky in the 1μm 1 cm wavelength range, general conditions for background limited photometry are derived. For λ<0.4 mm, temperature is the driving parameter, and for λ>0.4 mm, temperature and emissivity have equivalent importances. It can be shown on actual projects that these two regimes determine different optical and thermal concepts. Although based on a simplistic approach, this work intends to help designers to handle some basic system parameters of infrared and submillimeter instruments.
Desert François Xavier
Kirchner Thomas
Lamarre Jean-Michel
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