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Proceedings Paper

Measurement of three-dimensional rotational and translational displacements using a multifaceted mirror
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Paper Abstract

A measurement system that can measure the six-degree-of-freedom motions of arbitrary objects is proposed. The measurement system utilizes a special mirror looking like a triangular pyramid and having three reflective lateral surfaces, which is to be mounted on the objects of interest. Once a laser beam illuminates the top of the mirror, the mirror reflects and splits the beam into three beams. These reflected beams are detected by three position-sensitive detectors (PSD), respectively. Based on the signal outputs of the PSDs, the three-dimensional position and orientation of the mirror can be computed, which, in turn, determines the three dimensional position and orientation of the object. This paper proposes two options in applying the measurement principle, one of which has its laser beam source fixed in space, and the other controls the translational motion of the laser beam source to track the mirror. In this paper, the principle of the measurement is proved to be valid through theoretical analysis and experiments. And the advantages and disadvantages of both options are discussed.

Paper Details

Date Published: 30 September 2003
PDF: 12 pages
Proc. SPIE 5264, Optomechatronic Systems IV, (30 September 2003); doi: 10.1117/12.514998
Show Author Affiliations
Won Shik Park, Korea Advanced Institute of Science and Technology (South Korea)
Hyungsuck Cho, Korea Advanced Institute of Science and Technology (South Korea)

Published in SPIE Proceedings Vol. 5264:
Optomechatronic Systems IV
George K. Knopf, Editor(s)

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