Noncontact profilometric measurement of large-form parts

Wen-Chih Tai; Ming Chang

doi:10.1117/1.600838

1 September 1996 Noncontact profilometric measurement of large-form parts

Wen-Chih Tai, Ming Chang

Optical Engineering, Vol. 35, Issue 9, (September 1996). https://doi.org/10.1117/1.600838

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.

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Wen-Chih Tai and Ming Chang "Noncontact profilometric measurement of large-form parts," Optical Engineering 35(9), (1 September 1996). https://doi.org/10.1117/1.600838

Published: 1 September 1996

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