High-speed three-dimensional laser sensor

Liviu Bursanescu; Mihaela Bursanescu; Maher Hamdi; Francois Blais; David A. Green

doi:10.1117/12.380045

16 March 2000 High-speed three-dimensional laser sensor

Liviu Bursanescu, Mihaela Bursanescu, Maher Hamdi, Francois Blais, David A. Green

Author Affiliations +

Proceedings Volume 3958, Three-Dimensional Image Capture and Applications III; (2000) https://doi.org/10.1117/12.380045
Event: Electronic Imaging, 2000, San Jose, CA, United States

Abstract

Previous developments of Biris technology for road inspection application sled to the birth of a very rugged high power 3D sensor using a three-line laser projector. In this hostile environment where shock, vibration, dust and dirt are constantly present, 3D ranging must comply with very severe demands. Resolution, precision and reliability are strictly observed. The new approach keeps the same data density but uses high frame rate image capture and feature extraction. With high speed capture, the number of actual laser projections can be reduced to one, without having to decrease the number of measured profiles per second. This eases the data processing by keeping the same characteristics for the projected line from one acquired profile to the next and over the whole acquisition sequence. The data rate achieved maintains the maximum 10 cm profile spacing for the road surface sampling up to speeds of 72km/h. Range measurements and intensity I, are obtained for each measured point. The field-of-view and depth of field for this sensor are very important characteristics which are adapted for the application. However this solution implies a new sensor design and an optimized image capture geometry. Triangulation and defocusing are used to improve the signal to noise ratio and to provide immunity to false measurements.

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Liviu Bursanescu, Mihaela Bursanescu, Maher Hamdi, Francois Blais, and David A. Green "High-speed three-dimensional laser sensor", Proc. SPIE 3958, Three-Dimensional Image Capture and Applications III, (16 March 2000); https://doi.org/10.1117/12.380045

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