Surface shape measurement by phase-shifting digital holography with a wavelength shift.

Full Abstract

Surface contouring by phase-shifting digital holography is proposed and verified by experiments and numerical simulations. Digital holograms are recorded before and after mode hopping of a laser diode subject to current tuning, and the difference of the reconstructed phases at each wavelength is computed to deliver surface contours of a diffusely reflecting surface. Since normal incidence on the object is employed, the method does not need the removal of the tilt component and is free from the shadowing effect as advantages over the dual-incidence method proposed before by the first author.

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Author information

Author/s: Yamaguchi, Ichirou (I); Ida, Takashi (T); Yokota, Masayuki (M); Yamashita, Kouji (K);

Affiliation: Department of Electronic Engineering, Faculty of Engineering, Gunma University, Gunma, Japan. ichiyama(-atsign-)el.gunma-u.ac.jp

Journal and publication information

Publication Type: Journal Article

Journal: Applied optics (Appl Opt), published in United States. (Language: eng)

Reference: 2006-Oct; vol 45 (issue 29) : pp 7610-6

Dates: Created 2006/10/27; Completed 2006/11/24;

PMID: 17068593, status: PubMed-not-MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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