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Proceedings Paper

High-resolution infrared imaging utilizing a tip-tilt secondary mirror
Author(s): Laird Miller Close; David M. Wittman; Donald W. McCarthy
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Paper Abstract

A tip-tilt secondary system has been developed on a 2.3 m telescope. The system, called FASTTRAC, stabilizes image motion to less than 0.1' rms at closed loop corrective frequencies of <EQ 100 Hz. Resolutions of 0.19' and Strehl ratios of 0.14 have been obtained in long exposure images at 1.6 micrometers in seeing conditions of D/ro approximately 4. FASTTRAC is unique in its ability to use infrared guide stars (K <EQ 8). Recently FASTTRAC was upgraded to accommodate a low read noise CCD, allowing faint visible guide stars to be utilized. We anticipate that guide stars of R equals 17 will be adequate at correction frequencies of 30 Hz.

Paper Details

Date Published: 31 May 1994
PDF: 11 pages
Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); doi: 10.1117/12.176078
Show Author Affiliations
Laird Miller Close, Univ. of Arizona Steward Observatory (United States)
David M. Wittman, Univ. of Arizona Steward Observatory (United States)
Donald W. McCarthy, Univ. of Arizona Steward Observatory (United States)

Published in SPIE Proceedings Vol. 2201:
Adaptive Optics in Astronomy
Mark A. Ealey; Fritz Merkle, Editor(s)

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