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Proceedings Paper

Large-amplitude point vibration measurement with optical fiber moire-based technique
Author(s): Jesus D. R. Valera; Pranay G. Sinha; Toshihiko T. Yoshino; Ole Johan Lokberg
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Paper Abstract

We describe a technique that is used for the real-time measurement of the vibration of an object point. The technique can be used when the vibration is characterized by a large amplitude, i.e. several millimeters. The technique shows the additional advantages that it requires no special surface treatment and is insensitive to inplane object displacements. In this technique an object point is illuminated by a small diameter beam (at an angle) that is structured with straight parallel fringes. The illuminated object point is then imaged onto a Ronchi ruling. The total light transmitted through the Ronchi ruling is then used to recover the vibration of the object point, in real time, by using well known servo techniques.

Paper Details

Date Published: 6 July 1998
PDF: 6 pages
Proc. SPIE 3479, Laser Interferometry IX: Applications, (6 July 1998); doi: 10.1117/12.316467
Show Author Affiliations
Jesus D. R. Valera, Gunma Univ. (United States)
Pranay G. Sinha, Gunma Univ. (United States)
Toshihiko T. Yoshino, Gunma Univ. (Japan)
Ole Johan Lokberg, Norwegian Institute of Technology (Norway)


Published in SPIE Proceedings Vol. 3479:
Laser Interferometry IX: Applications
Ryszard J. Pryputniewicz; Gordon M. Brown; Werner P. O. Jueptner, Editor(s)

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