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Proceedings Paper

3-D inspection of large objects by moire profilometry
Author(s): Joel H. Blatt; Jeffery A. Hooker; Robert V. Belfatto; Eddie H. Young
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Paper Abstract

A moire profilometry method has been developed that is capable of inspecting objects whose size is limited only by the available laser power. The moire contours are generated in real time by projecting variable spacing gratings upon the target and filtering the image either optically in the video signal or in the computer. The system is designed to compare the surface shape of a test object with a previously stored image of a perfect object and to display the surface errors superimposed on a video image of the test object. A unique feature of the system is the continuously variable depth resolution which makes it usable either for human or robot adjustment of the test object or for automated pass/fail inspection.

Paper Details

Date Published: 1 October 1990
PDF: 5 pages
Proc. SPIE 1375, ICALEO '89: Optical Sensing and Measurement, (1 October 1990); doi: 10.1117/12.35026
Show Author Affiliations
Joel H. Blatt, Florida Institute of Technology (United States)
Jeffery A. Hooker, Florida Institute of Technology (United States)
Robert V. Belfatto, Newport Electro-Optic Systems, (United States)
Eddie H. Young, Newport Electro-Optic Systems, (United States)


Published in SPIE Proceedings Vol. 1375:
ICALEO '89: Optical Sensing and Measurement

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