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Proceedings Paper

Stability of the adaptive-optic point spread function: metrics, deconvolution, and initial Palomar results
Author(s): Eric E. Bloemhof; Kenneth Alan Marsh; Richard G. Dekany; Mitchell Troy; J. Marshall; Ben R. Oppenheimer; Thomas L. Hayward; Bernhard Rainer Brandl
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Paper Abstract

The essential benefit of adaptive optics is delivering a telescope point-spread function (PSF) limited by diffraction rather than by atmospheric turbulence. In practice, achieving diffraction-limited PSF diameters is relatively routine for modern high-order systems, at least within a restricted isoplanatic patch containing the guide star. The lower- intensity wings of the PSF, though, are often highly complex in their structure and subject to variability over short time scales. Spurious bright knots can occur among the secondary Airy maxima, and the 'waffle-mode' artifact may be problematic with a broad class of adaptive optics approaches. Good temporal stability of the adaptive-optic PSF is generally highly desirable if the full advantage of that spectacular PSF is to be realized; it is absolutely critical for many specific high resolution programs that can only be attempted with adaptive optics. In the course of commissioning the high-order adaptive optics system built at JPL for the Palomar 200-inch telescope, we have investigated PSF stability in the field under a variety of conditions. We discuss here our experimental findings at Palomar, and their implications for some key scientific programs.

Paper Details

Date Published: 7 July 2000
PDF: 10 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390384
Show Author Affiliations
Eric E. Bloemhof, Palomar Observatory (United States)
Kenneth Alan Marsh, California Institute of Technology (United States)
Richard G. Dekany, Jet Propulsion Lab. (United States)
Mitchell Troy, Jet Propulsion Lab. (United States)
J. Marshall, Jet Propulsion Lab. (United States)
Ben R. Oppenheimer, Univ. of California/Berkeley (United States)
Thomas L. Hayward, Cornell Univ. (United States)
Bernhard Rainer Brandl, Cornell Univ. (United States)

Published in SPIE Proceedings Vol. 4007:
Adaptive Optical Systems Technology
Peter L. Wizinowich, Editor(s)

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