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Proceedings Paper

Wavefront sensing and deconvolution of turbulence-degraded photon-counting images
Author(s): J. Sebag; Gerard Lelievre
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Paper Abstract

We present the focal instrumentation set up on the 2-m telescope at Pic du Midi, France developed to achieve third order aberration corrections on turbulence-degraded images using a photon-counting detector, a wavefront sensor, and a deconvolution method. This instrument is called DIVAS for visible image deconvolution using wavefront analysis. Our goal is to determine the necessary compromises to adopt in order to obtain high resolution images of low luminosity objects recorded in a photon-counting mode. In addition to the recording of short- exposure images at the telescope focus, a wavefront sensor measures simultaneously the incoming distorted wavefronts. In post-processing, the optical transfer function is calculated from the phase retrieval. The object is then reconstructed through a deconvolution process of the short-exposure images with the corresponding point spread functions.

Paper Details

Date Published: 1 April 1993
PDF: 5 pages
Proc. SPIE 1982, Photoelectronic Detection and Imaging: Technology and Applications '93, (1 April 1993); doi: 10.1117/12.142044
Show Author Affiliations
J. Sebag, Observatoire de Paris (France)
Gerard Lelievre, Observatoire de Paris (France)


Published in SPIE Proceedings Vol. 1982:
Photoelectronic Detection and Imaging: Technology and Applications '93

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