Infrared straylight measurements of the ISO telescope

Ulrich Klaas; Dietrich Lemke; T. Kranz; Rene J. Laureijs; Christoph Leinert; Josef Schubert; Manfred Stickel; L. Viktor Toth

doi:10.1117/12.317222

21 August 1998 Infrared straylight measurements of the ISO telescope

Ulrich Klaas, Dietrich Lemke, T. Kranz, Rene J. Laureijs, Christoph Leinert, Josef Schubert, Manfred Stickel, L. Viktor Toth

Author Affiliations +

Proceedings Volume 3354, Infrared Astronomical Instrumentation; (1998) https://doi.org/10.1117/12.317222
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

Measurements were performed to verify the straylight suppression in the IR Space Observatory telescope using the ISOPHOT instrument. These test comprised the near-field straylight by bright stars and planets as well as the far- field straylight by the Sun, the Earth, and the Moon. No significant straylight above the specifications reflecting the astronomical needs for low surface brightness absolute sky measurements could be detected at 25 and 170 micrometers . In some cases comparison to preflight straylight simultaneous were possible. The consistency of the predictions from the models with the measurement results confirms the reasonable assumptions made for the simulations. This will allow to further optimize the telescope design for future low background IR space telescopes.

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Ulrich Klaas, Dietrich Lemke, T. Kranz, Rene J. Laureijs, Christoph Leinert, Josef Schubert, Manfred Stickel, and L. Viktor Toth "Infrared straylight measurements of the ISO telescope", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); https://doi.org/10.1117/12.317222

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