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Proceedings Paper

Imaging white-light VISAR
Author(s): David J. Erskine; Neil C. Holmes
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Paper Abstract

An imaging white light velocimeter consisting of two image superimposing Michelson interferometers in series with the target interposed is demonstrated. Interferometrically measured 2D velocity maps can be made of moving surfaces using unlimited bandwidth incoherent and extended area sources. Short pulse and broadband chirped pulse lasers can be used to provide temporal resolution not possible with monochromatic illumination. An approximately 20 m/s per fringe imaging velocimeter is demonstrated using an ordinary camera flash for illumination. Radial and transverse velocity components can be measured when the illuminating and viewing beams are non-parallel.

Paper Details

Date Published: 28 May 1997
PDF: 4 pages
Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); doi: 10.1117/12.273416
Show Author Affiliations
David J. Erskine, Lawrence Livermore National Laboratory (United States)
Neil C. Holmes, Lawrence Livermore National Laboratory (United States)

Published in SPIE Proceedings Vol. 2869:
22nd International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; ALan M. Frank, Editor(s)

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