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Optical Engineering

Diffractive optical element-based profilometer for surface inspection
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Paper Abstract

We introduce a new 3-D sensor based on a diffractive optical element (DOE). Structured light is obtained by the interference of two beams. The design of the projection unit has the following features: the system is very simple, small and cheap and the fringe spacing is easily adjustable. Fringes generated by the DOE interferometer are analyzed by Fast Fourier Transform (FFT) method, which produced a 3-D perspective plot. The technique and the experimental results of real surface profiles are given.

Paper Details

Date Published: 1 January 2001
PDF: 9 pages
Opt. Eng. 40(1) doi: 10.1117/1.1331270
Published in: Optical Engineering Volume 40, Issue 1
Show Author Affiliations
Giuseppe Schirripa Spagnolo, Univ. di Roma (Italy)
Dario Ambrosini, Univ. dell'Aquila (Italy)


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