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Proceedings Paper

Remote six-axis deformation sensing with optical vortex beam
Author(s): Seichi Sato; Ikumatsu Fujimoto; Toru Kurihara; Shigeru Ando
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Paper Abstract

Multi-axis displacement sensing technique with a single optical beam is proposed. Our system consists of propagating optical vortex beam and its imaging system. Since optical vortex beam have feature points known as zero-points or phase singularities in its beam profile, we can detect lateral and rotational displacement of the beam precisely by imaging and tracking the points. Unlike conventional laser displacement sensing techniques, our measurement scheme can be applied for the deformation sensing of civil infrastructures such as bridges and highways where triangulations can not be applied. The basic optical setup is presented and the results of the fundamental experiments are shown.

Paper Details

Date Published: 13 February 2008
PDF: 8 pages
Proc. SPIE 6877, Free-Space Laser Communication Technologies XX, 68770I (13 February 2008); doi: 10.1117/12.764224
Show Author Affiliations
Seichi Sato, Univ. of Tokyo (Japan)
Ikumatsu Fujimoto, JST-CREST (Japan)
Toru Kurihara, Univ. of Tokyo (Japan)
Shigeru Ando, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 6877:
Free-Space Laser Communication Technologies XX
Steve Mecherle, Editor(s)

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