Vibration phase mapping using holographic optical element-based electronic speckle pattern interferometry

An out-of-plane sensitive electronic speckle pattern interferometer (ESPI) using holographic optical elements (HOEs) for vibration phase mapping is reported. Constant phase contours across a sinusoidally vibrating circular metal plate are mapped using reference beam phase modulation in the unbalance...

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Bibliographic Details
Published in:Optics and lasers in engineering 2012-08, Vol.50 (8), p.1161-1167
Main Authors: Bavigadda, Viswanath, Mihaylova, Emilia, Jallapuram, Raghavendra, Toal, Vincent
Format: Article
Language:English
Subjects:
Beams (radiation)
Electronic speckle pattern interferometry
Electronics
Holographic optical elements (HOEs)
Lasers
Mapping
Metal plates
Phase modulation
Speckle interferometry
Time average ESPI
Vibration
Vibration measurement
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Summary:An out-of-plane sensitive electronic speckle pattern interferometer (ESPI) using holographic optical elements (HOEs) for vibration phase mapping is reported. Constant phase contours across a sinusoidally vibrating circular metal plate are mapped using reference beam phase modulation in the unbalanced HOE based ESPI system. Reference phase modulation is implemented by modulating the drive current of a laser diode. The correlation fringes were obtained using the time average ESPI method. The phase measurement accuracy depends on the vibration amplitude of the object. ► Holographical optical elements (HOEs) were used for design of electronic speckle pattern interferometer (ESPI). ► Reference beam phase modulation in a time average ESPI was implemented for vibration study. ► Phase modulation was implemented by modulating the laser diode drive current. ► Vibration phase and amplitude maps of a metal plate drive by a piezoactuator were obtained. ► Phase accuracy depends on object vibration amplitude.
ISSN:0143-8166
1873-0302
DOI:10.1016/j.optlaseng.2012.01.020