Industrial implementation of diffractive optical elements for nondestructive testing

Steen Gruner Hanson; Lars Rene Lindvold; Bengt Hurup Hansen

doi:10.1117/12.248641

23 August 1996 Industrial implementation of diffractive optical elements for nondestructive testing

Steen Gruner Hanson, Lars Rene Lindvold, Bengt Hurup Hansen

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248641
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

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.

Citation Download Citation

Steen Gruner Hanson, Lars Rene Lindvold, and Bengt Hurup Hansen "Industrial implementation of diffractive optical elements for nondestructive testing", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248641

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