Wave-front curvature sensing from a single defocused image.

Details Wave-front curvature sensing from a single defocused image. Wave-front curvature sensing from a single defocused image.

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994josaa..11.1667h&link_type=abstract

Journal of the Optical Society of America A, Vol. 11, No. 5, p. 1667 - 1673

Physics

Optics

13

Adaptive Optics: Very Large Telescopes

Scientific paper

The possibility of sensing the curvature and the slope of a distorted wave front from a single defocused star image is investigated. The suggested technique is similar to the differential curvature-sensing method of Roddier but uses only a single sensor at a point either before or after the focus. In addition to optical and mechanical simplicity, the single-image sensor offers the advantage of reduced detector read noise and potentially higher efficiency compared with those from a differential system.

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