Electronic Speckle Pattern Interferometer using Holographic Optical Elements for Vibration Measurements

Authors

Viswanath Bavigadda, Technological University Dublin
Raghavendra Jallapuram, Technological University of DublinFollow
Emilia Mihaylova, Technological University of DublinFollow
Vincent Toal, Technological University of DublinFollow

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

Optics

Publication Details

Optics Letters, Vol. 35, No. 19, October 1, 2010, pp.3273-3275

Abstract

A simple and compact electronic speckle pattern interferometry (ESPI) built with holographic optical elements (HOEs) used for the study of out-of-plane vibration is reported. Carefully fabricated reflection and transmission HOEs provide reference and object beams in the interferometer. All the alignment difficulties in conventional ESPI systems are minimized using HOEs. The time average ESPI subtraction method is used to generate correlation fringes. The background speckle noise is removed by introducing a phase shift between sequential images. The amplitude and phase maps are obtained using path difference modulation in an unbalanced ESPI.

DOI

https://doi.org/10.1364/OL.35.003273

Recommended Citation

Bavigadda, V. et. al. (2010) Electronic speckle pattern interferometer using holographic optical elements for vibration measurements. Optics Letters, Vol. 35, No. 19, October 1, pp.3273-3275. doi:10.1364/OL.35.003273

Funder

Enterprise Ireland