Evaluation of high frequency vibrations using electronic speckle pattern interferometry
Citation:
Toal, Vincent; Rice, Henry; Meskell, Craig; Armstrong, Carol; Bowe, Brian, Evaluation of high frequency vibrations using electronic speckle pattern interferometry, Proceedings of SPIE - The International Society for Optical Engineering, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, Galway, Ireland, 5 September, Glynn T.J., 4876, 2, 2002, 1054-1063Download Item:
Evaluation.pdf (Published (publisher's copy) - Peer Reviewed) 1.419Mb
Abstract:
The available techniques for the study of high frequency vibration using electronic speckle pattern
interferometry (ESPI) are briefly surveyed. We concentrate on two methods in particular. The first
is a straightforward approach in which a CCD camera is used having a frame rate of at least twice
the highest vibration frequency so that the sampling criterion is satisfied. The images are processed
and analysed off-line. Digital phase shifting can be also implemented for detailed fringe analysis.
The second approach is time-averaged ESPI in which the Bessel fringe function can be analysed in
real time by modulating the optical path difference in the interferometer. This can be done either by
using a vibrating component or, as in the present work, by direct modulation of the laser wavelength
at the frequency of the vibrating mode.
Author's Homepage:
http://people.tcd.ie/cmeskellDescription:
PUBLISHED
Author: MESKELL, CRAIG
Other Titles:
Proceedings of SPIE - The International Society for Optical EngineeringOpto-Ireland 2002: Optics and Photonics Technologies and Applications
Type of material:
Conference PaperSeries/Report no:
48762
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