31 May 1994 High-resolution infrared imaging utilizing a tip-tilt secondary mirror
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Laird Miller Close, Laird Miller Close, David M. Wittman, David M. Wittman, Donald W. McCarthy, Donald W. McCarthy, } "High-resolution infrared imaging utilizing a tip-tilt secondary mirror", Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); doi: 10.1117/12.176078; https://doi.org/10.1117/12.176078
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