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Timesaving phase retrieval approach based on difference map normalization and fast iterative algorithm
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DOI：10.1016/j.optlaseng.2019.03.010.png)
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To achieve high measurement accuracy with less computational time in phase shifting interferometry, a random phase retrieval approach based on difference map normalization and fast iterative algorithm (DN&FIA) is proposed, it doesn't need pre-filtering, and has the advantage of the iterative algorithms-high accuracy, moreover, it also has the advantage of non-iterative algorithms-timesaving, it only needs three randomly phase shifted interferograms, and the initial phase shifts of the iteration can be random, last but not least, it is effective for the circular, straight or complex fringes. The simulations and experiments verify the correctness and feasibility of DN&FIA.
Keyword:
Phase shifting algorithm
Iterative algorithm
Difference map normalization
Phase shift
Interferometry
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