High-speed shadowgraphy and interferometry using an acousto-optic laser deflector

Tetsuo Fukuchi; Koshichi Nemoto

doi:10.1117/12.616256

21 September 2005 High-speed shadowgraphy and interferometry using an acousto-optic laser deflector

Tetsuo Fukuchi, Koshichi Nemoto

Proceedings Volume 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications; 59200R (2005) https://doi.org/10.1117/12.616256
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Tetsuo Fukuchi and Koshichi Nemoto "High-speed shadowgraphy and interferometry using an acousto-optic laser deflector", Proc. SPIE 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications, 59200R (21 September 2005); https://doi.org/10.1117/12.616256

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