Stray light comparison of SIRTF designs with different aperture stop locations

Ann St. Clair Dinger

doi:10.1117/12.22653

1 December 1990 Stray light comparison of SIRTF designs with different aperture stop locations

Ann St. Clair Dinger

Proceedings Volume 1331, Stray Radiation in Optical Systems; (1990) https://doi.org/10.1117/12.22653
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

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.

Citation Download Citation

Ann St. Clair Dinger "Stray light comparison of SIRTF designs with different aperture stop locations", Proc. SPIE 1331, Stray Radiation in Optical Systems, (1 December 1990); https://doi.org/10.1117/12.22653

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