title: Frequency-multiplex Fourier-transform profilometry: a single-shot three-dimensional shape measurement of objects with large height discontinuities and/or surface isolations.
abstract: The performance of Fourier-transform profilometry is enhanced by a new technique that is based on spatial frequency multiplexing combined with the Gushov-Solodkin phase unwrapping algorithm. The technique permits the three-dimensional shape measurement of objects that have discontinuous height steps and/or spatially isolated surfaces, which has not been possible by conventional Fourier-transform profilometry. An important feature of the technique is that it requires only a single fringe pattern; the single-shot recording makes possible the instantaneous three-dimensional shape measurement of discontinuous objects in fast motion. Experimental results are presented that demonstrate the validity of the principle.
authors.affiliation: Department of Communication and Systems Engineering, University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Takeda
authors.forename: Q
authors.initials: Q
authors.lastname: Gu
authors.forename: M
authors.initials: M
authors.lastname: Kinoshita
authors.forename: H
authors.initials: H
authors.lastname: Takai
authors.forename: Y
authors.initials: Y
authors.lastname: Takahashi