Abstract

It is well known that, whereas atmospheric turbulence severely limits the effective resolution of a long-integration image obtained by a ground-based telescope, short exposure images retain diffraction-limited information. Since this fact was first pointed out by Labeyrie¹, a variety of imaging techniques have been proposed. Correlation-based techniques – Laberyie’s method¹, triple-correlation^2,3, Knox- Thompson⁴ – all recover diffraction-limited information about the observed object. For each of these techniques, a phase-retrieval problem must be solved to obtain an estimate of the object. In addition, a reference point-source must be available to correct for atmospheric seeing. A brief review of these techniques is found in the book chapter by Dainty and Fienup⁵.

© 1992 Optical Society of America