Imaging white-light VISAR

David J. Erskine; Neil C. Holmes

doi:10.1117/12.273416

28 May 1997 Imaging white-light VISAR

David J. Erskine, Neil C. Holmes

Author Affiliations +

Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273416
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States

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.

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David J. Erskine and Neil C. Holmes "Imaging white-light VISAR", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273416

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