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Journal of Biomedical Optics • Open Access

Ocular microtremor measurement using laser-speckle metrology
Author(s): Emer Kenny; Davis Coakley; Gerard Boyle

Paper Abstract

We describe a novel, noninvasive measurement approach for recording a small involuntary tremor of the eye known as ocular microtremor. The method is based on measuring out-of-plane angular displacements of a target by using laser-speckle correlation of images recorded in the Fourier plane of a lens. The system has a dynamic range of 4 to 5000 μrad, resolution of 4 μrad, and a bandwidth of 250 Hz. The design and optimization of the system is presented with an in vitro validation of the system against its specification.

Paper Details

Date Published: 11 January 2013
PDF: 12 pages
J. Biomed. Opt. 18(1) 016010 doi: 10.1117/1.JBO.18.1.016010
Published in: Journal of Biomedical Optics Volume 18, Issue 1
Show Author Affiliations
Emer Kenny, Trinity College Dublin (Ireland)
Davis Coakley, St. James's Hospital (Ireland)
Gerard Boyle, St. James's Hospital (Ireland)

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