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Proceedings Paper

Compact optically based systems for linear and angular displacement sensing
Author(s): Steen Gruner Hanson; Michael Linde Jakobsen; Steven Richard Kitchen; Stefan Osten
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Paper Abstract

Two new, compact sensor systems for measuring linear and angular displacements are presented. Both systems have been designed with the aim of being compact, reliable, low-priced, yet performs with reasonable accuracy. Common for both systems is the use of Vertical Surface Emitting Lasers (VCSELs) as the coherent light source. The first system is a device for measuring one component of a linear translation, being it of a solid surface or scattering particles in a flow. A VCSEL array constitutes the illuminating source creating a fringe-like pattern in the measuring volume by imaging. Scattered light from the object is detected with a single detector and a spectral analysis of the signal reveals the traverse velocity, the fringe distance being known. For measuring rotation of a semi-reflective steel ball, a compact system has been developed, again based on a single, lensless VCSEL as the source. This system is further reduced in size, as compared to the previous system and provides adequate accuracy for its intended purpose.

Paper Details

Date Published: 29 July 2002
PDF: 10 pages
Proc. SPIE 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, (29 July 2002); doi: 10.1117/12.484472
Show Author Affiliations
Steen Gruner Hanson, Risoe National Lab. (Denmark)
Michael Linde Jakobsen, Risoe National Lab. (Denmark)
Steven Richard Kitchen, Risoe National Lab. (Denmark)
Stefan Osten, ISMS/Hochschule Brenen (Germany)


Published in SPIE Proceedings Vol. 4900:
Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life

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