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Proceedings Paper

Industrial implementation of diffractive optical elements for nondestructive testing
Author(s): Steen Gruner Hanson; Lars Rene Lindvold; Bengt Hurup Hansen
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Paper Abstract

Two robust systems for vibration measurements are presented. Both systems are based on low-cost laser diodes. The stability of the optical systems is achieved by implementing the optical system in a holographic optical element while using a common-path interferometer concept for the measurement scheme. The former system facilitates real-time simultaneous tracking of vibrations about two axes perpendicular to the optical axis. The latter system is an electronic speckle pattern interferometer working in a differential mode providing whole-field information on the angular deformation about one axis between two states of the object. It will be argued that these concepts will provide compact, self-aligning systems for industrial use due to the inherent possibility for mass fabrication.

Paper Details

Date Published: 23 August 1996
PDF: 9 pages
Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); doi: 10.1117/12.248641
Show Author Affiliations
Steen Gruner Hanson, Riso National Lab. (Denmark)
Lars Rene Lindvold, Riso National Lab. (Denmark)
Bengt Hurup Hansen, Riso National Lab. (Denmark)


Published in SPIE Proceedings Vol. 2868:
Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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