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The present paper describes a newly devised sensor, which has the ability to detect the two-dimensional position and the one-dimensional angle of a light spot simultaneously. Ordinary laser-based measurement systems utilize CCD or PSD sensors. These conventional sensors can detect only a light spot's position. When the sensor can detect the incident angle of a light spot as well as the position, the sensor has a wide range of applicability. The sensor consists of two linear array-type sensors whose depth positions are slightly different. We have designed and built a prototype sensor system. We experimentally verified the practicable accuracy of the present sensor system. We also applied the present sensor system to two typical laser-based measurement systems: 2-D position measurement, and 3-D shape measurement for specular objects. Experimental results show that the sensor system was applicable to a laser-based measurement system.
CCD image sensors
measurement by laser beam
Digital Object Identifier: 10.1109/SICE.2003.1323391
Published with permission from the copyright holder. This is the institute's copy, as published in SICE 2003 Annual Conference, 2003, Volume 1, Pages 456-460.
Copyright © 2003 IEEE. All rights reserved.
SICE 2003 Annual Conference