Physics – Optics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.2029..299r&link_type=abstract
Proc. SPIE Vol. 2029, p. 299-310, Digital Image Recovery and Synthesis II, Paul S. Idell; Ed.
Physics
Optics
Scientific paper
In a closed loop adaptive optics system the wavefront sensor is continuously measuring the residual wavefront error. Thus, wavefront information is continuously available to use for image reconstruction. It is shown here that this wavefront information can be used to improve the effective optical transfer function of compensated imaging systems when this information is used in a post processing scheme. This technique is closely related to self referenced speckle holography, and is referred to here as compensated self referenced speckle holography. This method requires good spatial sampling of the residual phase error and degrades gracefully as the wavefront sensor signal-to-noise ratio decreases. The technique can be used to reduce the required closed loop bandwidth of an imaging system, allowing longer integration times in the wavefront sensor, and allowing dimmer objects to be imaged without the use of an artificial guide star.
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