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Optical Engineering

Calibration facility and preflight characterization of the photometer in the Infrared Space Observatory
Author(s): Juergen Wolf; Carlos Gabriel; Ulrich Groezinger; Ingolf Heinrichsen; Gerhard Hirth; Stefan Kirches; Dietrich Lemke; Josef Schubert; Bernhard Schulz; Clemens N. Tilgner; Manfred Boison; Albrecht Frey; Ib Lundgaard Rasmussen; Robert Wagner; Klaus Proetel
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Paper Abstract

A calibration facility simulating the optical and cryogenic environment of the Infrared Space Observatory (ISO) satellite has been built for characterizing the ISO photometer (ISOPHOT). This facility uses a commercially calibrated 900-K blackbody radiation source and optics at room temperature to provide an f/15 beam to the instrument, which is contained in a LHe cryostat. The low-level infrared flux levels of the ISO are obtained by using a light-sealed instrument chamber and cold attenuation filters. The infrared flux can be calculated using the known blackbody emission and the cold calibrated transmission spectra of the filters. The calibration facility further provides a scanning mechanism, a light modulator, and filters for polarization measurements and wavelength calibrations of the ISOPHOT spectrometer channels. Electrical support equipment for the instrument operation and software for data archiving and analysis have been customized for this project. The test program comprised a standardized acceptance test for the entire instrument and special tests addressing individual instrument properties. The data obtained contain the photometric sensitivities of ISOPHOT, optimized instrument settings, reference data for the integrated system tests, and inputs for the ongoing mission planning.

Paper Details

Date Published: 1 January 1994
PDF: 11 pages
Opt. Eng. 33(1) doi: 10.1117/12.155395
Published in: Optical Engineering Volume 33, Issue 1
Show Author Affiliations
Juergen Wolf, Max-Planck-Institut fuer Astronomie (Germany)
Carlos Gabriel, Max-Planck-Institut fuer Astronomie (Germany)
Ulrich Groezinger, Max-Planck-Institut fuer Astronomie (Germany)
Ingolf Heinrichsen, Max-Planck-Institut fuer Astronomie (Germany)
Gerhard Hirth, Max-Planck-Institut fuer Astronomie (Germany)
Stefan Kirches, Max-Planck-Institut fuer Astronomie (Germany)
Dietrich Lemke, Max-Planck-Institut fuer Astronomie (Germany)
Josef Schubert, Max-Planck-Institut fuer Astronomie (Germany)
Bernhard Schulz, Max-Planck-Institut fuer Astronomie (Germany)
Clemens N. Tilgner, Max-Planck-Institut fuer Astronomie (Germany)
Manfred Boison, Dornier GmbH (Germany)
Albrecht Frey, Dornier GmbH (Germany)
Ib Lundgaard Rasmussen, Danish Space Research Institute (Denmark)
Robert Wagner, Max-Planck-Institut fuer Kernphysik (Germany)
Klaus Proetel, DARA (Germany)

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