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Proceedings Paper

Degradation of TAUVEX optical system performance due to contamination by outgassed spacecraft materials
Author(s): Gad Nahor; Michael G. Baer; Micha Anholt; Michael Murat; Yoram Noter; Yeshayahu Lifshitz; Nachman Saar; Ofer Braun
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Paper Abstract

The space ultrahigh vacuum environment induces outgassing of spacecraft organic materials which may condense on optical surfaces and degrade the performance of optical systems. Lab simulation outgassing tests show transmission and/or reflection losses of optical components (i.e., optically polished plates and mirrors) measured at the wavelength range of 200 - 800 nm. The losses caused by deposition of outgassed products on the optical surfaces at the amount of 10-6 - X10-4 g/cm2 were measured. The loss mechanism is most likely scattering of light. This experimental data was combined with a computerized ab-initio model which calculated the contamination developed in a simulated preliminary design of the TAUVEX astronomical UV research telescope. This enabled us to estimate the performance of TAUVEX's optical system as a function of mission time, and served as a guideline for selection of materials, cleanliness requirements, thermal conditions and bakeout processes.

Paper Details

Date Published: 13 August 1993
PDF: 16 pages
Proc. SPIE 1971, 8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing, (13 August 1993); doi: 10.1117/12.151023
Show Author Affiliations
Gad Nahor, Soreq Nuclear Research Ctr. (Israel)
Michael G. Baer, Soreq Nuclear Research Ctr. (Israel)
Micha Anholt, Soreq Nuclear Research Ctr. (Israel)
Michael Murat, Soreq Nuclear Research Ctr. (Israel)
Yoram Noter, Soreq Nuclear Research Ctr. (Israel)
Yeshayahu Lifshitz, Soreq Nuclear Research Ctr. (Israel)
Nachman Saar, ElOp Electrooptics Industries Ltd. (Israel)
Ofer Braun, ElOp Electrooptics Industries Ltd. (Israel)

Published in SPIE Proceedings Vol. 1971:
8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing
Moshe Oron; Itzhak Shladov; Yitzhak Weissman, Editor(s)

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