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Proceedings Paper

Stray light comparison of SIRTF designs with different aperture stop locations
Author(s): Ann St. Clair Dinger
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Paper Abstract

The APART/PADE program is used to examine whether the SIRTF aperture stop can be moved back to the primary mirror without jeopardizing the requirement for natural background-limited observations. The straylight performance of the baseline design, which has the aperture stop at the secondary mirror, is compared to that of a revised design with the stop at the primary mirror. Both designs include reimaging optics and a LYOT stop, as well as a chopping secondary mirror. The straylight due to off-axis sources and telescope thermal emission is investigated at 50 and 550 microns. It is found that in SIRTF, where every instrument will include reimaging optics and a LYOT stop, the aperture stop may be moved to the primary mirror with modest degradation of the straylight performance.

Paper Details

Date Published: 1 December 1990
PDF: 9 pages
Proc. SPIE 1331, Stray Radiation in Optical Systems, (1 December 1990); doi: 10.1117/12.22653
Show Author Affiliations
Ann St. Clair Dinger, Sterling Federal Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 1331:
Stray Radiation in Optical Systems
Robert P. Breault, Editor(s)

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