Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21
Online ISSN : 2424-3086
ISSN-L : 2424-3086
2015.8
Session ID : 203
Conference information
0203 Reduction of Measurement Error Induced by Laser Speckles in Scanning Operations using a Triangulation-based Laser displacement Sensor
Soichi IBARAKIYoshitomo KITAGAWAYoshihiro KIMURAShizuo NISHIKAWA
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Abstract
A triangulation-based laser displacement sensor, using the diffuse reflection light, has a strong advantage in its robustness against the tilting of the object surface to the sensor's sensitive direction. On the other hand, it is often subject to higher-frequency noise-like measurement error in high-speed scanning operations. This paper first reviews that it is caused by the speckle in the reflected laser beam spot. Then, a scheme to reduce this speckle-induced scanning error is proposed by using two CCD image sensors aligned symmetrically about the laser beam axis. Its effectiveness is verified by preliminary experimentation.
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© 2015 The Japan Society of Mechanical Engineers
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