Iteration algorithm for computer-aided speckle interferometry.

Details Iteration algorithm for computer-aided speckle interferometry. Iteration algorithm for computer-aided speckle interferometry.

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apopt..33.5308j&link_type=abstract

Applied Optics, Vol. 33, No. 23, p. 5308 - 5317

Physics

Optics

Speckle Interferometry: Methods Of Reduction

Scientific paper

An iteration algorithm for the analysis of speckle interference patterns is presented. First, four digitized phase-shifted patterns are locally averaged. The phase information is then extracted by the usual phase shift algorithm. The wrapped phase is in turn used to reconstruct four new phase-shifted patterns. These three steps form a cycle. Repetition of the three steps has a great effect on suppressing speckle noise. Theoretical study shows that the iterated phase converges to a perfect result under ideal conditions. In general, the iteration causes little error but improves the phase information a great deal. The signal-to-noise ratio rises when additional iterations are performed.

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