| Fringe projection with a sinusoidal phase grating. | |
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MedLine Citation:
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PMID: 19696868 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Phase-shifting profilometry requires projection of sinusoidal fringes on a 3D object. We analyze the visibility and frequency content of fringes created by a sinusoidal phase grating at coherent illumination. We derive an expression for the intensity of fringes in the Fresnel zone and measure their visibility and frequency content for a grating that has been interferometrically recorded on a holographic plate. Both evaluation of the systematic errors due to the presence of higher harmonics by simulation of a profilometric measurement and measurement of 3D coordinates of test objects confirm the good performance of the sinusoidal phase grating as a projective element. In addition, we prove theoretically that in comparison with a sinusoidal amplitude grating this grating produces better quality of fringes in the near-infrared region. Sinusoidal phase gratings are fabricated easily, and their implementation in fringe projection profilometry facilitates construction of portable, small size, and low-cost devices. |
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Authors:
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Elena Stoykova; Georgi Minchev; Ventseslav Sainov |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied optics Volume: 48 ISSN: 1539-4522 ISO Abbreviation: - Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-08-21 Completed Date: 2009-11-04 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0247660 Medline TA: Appl Opt Country: United States |
Other Details:
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Languages: eng Pagination: 4774-84 Citation Subset: - |
Affiliation:
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Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl. 101, P.O. Box 95, 1113 Sofia, Bulgaria. elena@optics.bas.bg |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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