Stray light design and analysis of the SNAP Telescope

M. J. Sholl; F. S. Grochocki; J. C. Fleming; R. W. Besuner; P. Jelinsky; M. L. Lampton

doi:10.1117/12.732517

14 September 2007 Stray light design and analysis of the SNAP Telescope

M. J. Sholl, F. S. Grochocki, J. C. Fleming, R. W. Besuner, P. Jelinsky, M. L. Lampton

Proceedings Volume 6675, Optical Modeling and Performance Predictions III; 66750C (2007) https://doi.org/10.1117/12.732517
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

SNAP is a proposed space-based experiment designed to quantify dark energy by measuring the redshift-magnitude diagram of supernovae and to quantify the growth of structure in the universe by measuring weak gravitational lensing over cosmological distances. The baseline SNAP telescope is an ambient temperature three-mirror anastigmat (TMA). The goal of the stray light design is to ensure that stray light in the 0.4 to 1.7 micron wavelength range does not exceed a small fraction of Zodiacal radiation within the mission's target field near the North ecliptic pole. At visible wavelengths, we expect the primary source of stray light will be starlight scattered by the primary mirror. In our longest wavelength NIR band we expect thermal emission from the mirrors and structure will dominate. Scattered stray light is mitigated by an internal field stop, and a cold (140K) internal aperture stop. Stray light scattered by mirror roughness and particulate contamination, as well as scattering from the telescope baffles are modeled and quantified. The baseline design and analyses contained herein ensure that stray light will be less than 10% of Zodiacal in all bands.

Citation Download Citation

M. J. Sholl, F. S. Grochocki, J. C. Fleming, R. W. Besuner, P. Jelinsky, and M. L. Lampton "Stray light design and analysis of the SNAP Telescope", Proc. SPIE 6675, Optical Modeling and Performance Predictions III, 66750C (14 September 2007); https://doi.org/10.1117/12.732517

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available