Journal
OPTIK
Volume 121, Issue 1, Pages 23-28Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2008.05.010
Keywords
Phase-shifting; Phase error; Intensity saturation; Phase-recovering algorithm
Categories
Funding
- National Natural Science Foundation of China [10672065]
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The phase error and its periodic behavior caused by the partial intensity saturation of fringe patterns in the digital projection grating phase-shifting profilometry are studied. A saturation coefficient K is defined to describe the saturation degree of the fringe patterns projected on a measured object. The distribution of the phase error is analyzed through a simulation method. Moreover, a novel phase-recovering algorithm is studied to resolve the phase error issue introduced by the partial saturated fringe patterns. The real phase can be recovered by the unsaturated intensity values. A series of results corresponding to different degrees of saturation defined by K are given to prove the validity of the proposed algorithm. (C) 2008 Elsevier GmbH. All rights reserved.
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