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Optical Engineering

Noncontact profilometric measurement of large-form parts
Author(s): Wen-Chih Tai; Ming Chang
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Paper Abstract

A quick and efficient technique for automatic profilometric measurement of a large-form part is proposed and verified by experiment. When a laser stripe is projected onto an object, the deformed laser line image is detected by a solid-state array camera and automatically transferred to its space position using a least-squares mapping algorithm. Measurements can be executed on any surface of a 3-D object except the base. Large arrays of data points are acquired on each surface by means of a scanning mechanism. Since the measuring data from each laser stripe position can provide 2-D information concerning the surface contour, the laser stripe and the solid-state array camera are integrated into a measurement system for obtaining the entire 3-D information. Experimental results show that this technique can determine the 3-D profile of an object with an accuracy of 0.5 mm.

Paper Details

Date Published: 1 September 1996
PDF: 6 pages
Opt. Eng. 35(9) doi: 10.1117/1.600838
Published in: Optical Engineering Volume 35, Issue 9
Show Author Affiliations
Wen-Chih Tai, Chung Yuan Christian Univ. (China)
Ming Chang, Chung Yuan Christian Univ. (Taiwan)

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