High-resolution infrared imaging utilizing a tip-tilt secondary mirror

Laird Miller Close; David M. Wittman; Donald W. McCarthy Jr.

doi:10.1117/12.176078

31 May 1994 High-resolution infrared imaging utilizing a tip-tilt secondary mirror

Laird Miller Close, David M. Wittman, Donald W. McCarthy Jr.

Proceedings Volume 2201, Adaptive Optics in Astronomy; (1994) https://doi.org/10.1117/12.176078
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

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/r_o 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.

Citation Download Citation

Laird Miller Close, David M. Wittman, and Donald W. McCarthy Jr. "High-resolution infrared imaging utilizing a tip-tilt secondary mirror", Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); https://doi.org/10.1117/12.176078

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