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Proceedings Paper

High-speed shadowgraphy and interferometry using an acousto-optic laser deflector
Author(s): Tetsuo Fukuchi; Koshichi Nemoto
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Paper Abstract

An acousto-optic laser deflector was used to obtain shadowgraphs and laser interference fringe patterns at microsecond-order exposure times by blocking the undeflected light and exposing the imaging device to the deflected light. This method allows μ-order imaging using an ordinary CCD camera, and is less susceptible to damage resulting from incidence of high intensity light, which is a problem when using image intensifiers. Using this method, shadowgraphs and laser interference fringe patterns showing density changes accompanying spark discharges in air, pre-breakdown phenomena such as streamers and leaders, and laser-induced breakdown in air were obtained. In addition, by sequentially applying high frequency signals of different frequencies, the incident light was deflected to different regions of the CCD chip, which allowed time-resolved imaging of laser interference fringes.

Paper Details

Date Published: 21 September 2005
PDF: 10 pages
Proc. SPIE 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications, 59200R (21 September 2005); doi: 10.1117/12.616256
Show Author Affiliations
Tetsuo Fukuchi, Central Research Institute of Electric Power Industry (Japan)
Koshichi Nemoto, Central Research Institute of Electric Power Industry (Japan)


Published in SPIE Proceedings Vol. 5920:
Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications
Zenghu Chang; Jean-Claude Kieffer; Jerome B. Hastings; Stuart Kleinfelder; Dennis L. Paisley, Editor(s)

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