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Proceedings Paper

A spectral and photometrical calibration system for infrared instrumentation
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Paper Abstract

We present a calibration unit to be used in near and medium infrared instrumentation. The system belongs to the 'black-body' (BB) and 'integrating-sphere' (IS) category and has been developed during the phase-A study as part of the Medium Infrared Instrument (MIRI) to be inserted on the NASA-ESA mission James Webb Space Telescope (JWST). A voltage driven resistance temperature device (RTD) is used as active thermal light source with spectral energy distribution determined by the working temperature and material characteristics, while the integrating sphere is used in order to create a Lambertian beam of calibration light. The system would provide light both for flat-fielding calibration and, in a further development, for wavelength calibration making use of the same illumination optics. We will describe the experimental setup and the properties requested by the device. A complete analytical simulation guiding the dimensioning of the emitter and IS is given with the results from several laboratory test made in order to qualify the system in realistic operating conditions.

Paper Details

Date Published: 18 August 2005
PDF: 8 pages
Proc. SPIE 5897, Photonics for Space Environments X, 58970G (18 August 2005); doi: 10.1117/12.623579
Show Author Affiliations
Favio Bortoletto, INAF, Osservatorio Astronomico di Padova (Italy)
Demetrio Magrin, INAF, Osservatorio Astronomico di Padova (Italy)
Univ. di Padova (Italy)
Carlotta Bonoli, INAF, Osservatorio Astronomico di Padova (Italy)
Maurizio D'Alessandro, INAF, Osservatorio Astronomico di Padova (Italy)

Published in SPIE Proceedings Vol. 5897:
Photonics for Space Environments X
Edward W. Taylor, Editor(s)

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