New stereo laser triangulation device for specular surface inspection

Marc Samson; Marc L. Dufour

doi:10.1117/12.51081

1 January 1991 New stereo laser triangulation device for specular surface inspection

Marc Samson, Marc L. Dufour

Proceedings Volume 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection; (1991) https://doi.org/10.1117/12.51081
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

A laser stereo triangulation device is described which permits easier observation of objects with specular surfaces. The device's two cameras are first calibrated with the light pattern. The calibration data are used to compute the unique and reversible function to mapping the image sensed by the second camera within the image plane of the first camera. Simple correlation techniques are used to extract the originally projected light pattern from the numerous artifacts. Because of its simplicity, the algorithm can be computed in real time at video rates to produced a clean image representative of the surface geometry. Experiments conducted using a laboratory prototype produce reliable results wih promise for practical applications.

Citation Download Citation

Marc Samson and Marc L. Dufour "New stereo laser triangulation device for specular surface inspection", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); https://doi.org/10.1117/12.51081

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