Physics – Optics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1114....2h&link_type=abstract
IN: Active telescope systems; Proceedings of the Meeting, Orlando, FL, Mar. 28-31, 1989 (A90-30852 12-74). Bellingham, WA, Socie
Physics
Optics
3
Adaptive Optics, Astronomical Photography, Atmospheric Correction, Wave Front Deformation, Atmospheric Turbulence, Error Analysis, Image Correlators, Mirrors, Optimization
Scientific paper
The technology and components required to implement discrete adaptive optics systems capable of compensating wavefront errors caused by atmospheric turbulence in ground-based astronomical telescopes are reviewed. Characteristics of the major types of deformable mirrors, wavefront sensors, and wavefront reconstructors are described. The effects of device limitations such as the size of the compensation subapertures and the signal-to-noise ratio of the wavefront sensor detector on the overall performance of adaptive optics systems are discussed. This review indicates that the technology exists to enable conventional adaptive optics systems to perform close to their inherent performance limits, the major impediment being the high cost of the components required. However, a larger problem exists in that the usefulness of adaptive optics for ground-based astronomy is severely limited by external factors such as the small size of the isoplanatic patch and the small photon flux available from most astronomical objects.
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