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Proceedings Paper

Comparison of computer postprocessing and low-order adaptive optics
Author(s): Richard G. Lane; Andreas Glindemann
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Paper Abstract

Using simulation we investigate the difference in performance between low order adaptive optics and computer post-processing techniques. It is shown that even a simple tip-tilt defocus correction implemented with a rigid mirror can improve the quality of speckle images and thus improve the bispectral reconstructions at low photon rates. As an alternative to this low cost adaptive optics system we consider the use of ensemble deconvolution where a Shack- Hartmann sensor is used to augment the speckle images. Results are presented to show that this is a viable alternative to adaptive optics when a simple system for compensating atmospheric turbulence is desired. In particular we investigate the optimal size of Shack- Hartmann array when there is significant CCD readout noise.

Paper Details

Date Published: 9 November 1993
PDF: 12 pages
Proc. SPIE 2029, Digital Image Recovery and Synthesis II, (9 November 1993); doi: 10.1117/12.162006
Show Author Affiliations
Richard G. Lane, Univ. of Tasmania (Australia)
Andreas Glindemann, Max-Planck-Institut fuer Astronomie (Germany)

Published in SPIE Proceedings Vol. 2029:
Digital Image Recovery and Synthesis II
Paul S. Idell, Editor(s)

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