Miniaturized optical system based on digital holography

Giancarlo Pedrini; I. Alexeenko

doi:10.1117/12.579570

22 June 2004 Miniaturized optical system based on digital holography

Giancarlo Pedrini, I. Alexeenko

Proceedings Volume 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2004) https://doi.org/10.1117/12.579570
Event: Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2004, Ancona, Italy

Abstract

A miniaturized system based on digital holographic inteferometry has been developed and used for the measurement of dynamical deformations, where measurements need to be performed at "hidden" surfaces or inside more or less closed objects. A Q-switched pulsed laser is used. Two digital holograms of the test object, corresponding to the two laser pulses, are captured at separate video frames of the CCD-camera, transferred in a frame grabber and further processed in a PC. If during the interval between the two laser pulses (usually in the range of 5 - 600 μs) the object undergoes a vibration, a fringe pattern will result from the difference between the two holograms. This fringe pattern has the information needed to quantitatively evaluate the vibration.

Citation Download Citation

Giancarlo Pedrini and I. Alexeenko "Miniaturized optical system based on digital holography", Proc. SPIE 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 June 2004); https://doi.org/10.1117/12.579570

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