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'''Gerchberg Saxton Algorithm'''
[[Image:GS-diagram.png|thumb|Gerchberg-Saxton Algortithm]]
The Gerchberg Saxton (GS) algorithm is an iterative [[algorithm]] for retrieving the phase of a pair of light distributions (or any other mathematically valid distribution) related via a propagating function, such as the [[Fourier transform]], if their intensities at their respective optical planes are known.
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