Slit-mounted LED fiducial system for rotating mirror streak cameras

Larry L. Shaw; Steven A. Muelder; Anthony T. Rivera

doi:10.1117/12.50563

1 January 1992 Slit-mounted LED fiducial system for rotating mirror streak cameras

Larry L. Shaw, Steven A. Muelder, Anthony T. Rivera

Proceedings Volume 1539, Ultrahigh- and High-Speed Photography, Videography, and Photonics '91; (1992) https://doi.org/10.1117/12.50563
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

We have developed a fiducial system for rotating mirror streak cameras that utilizes light emitting diodes mounted at the slit position of the camera. The diodes are driven to the required high brightness by a unique pulse power circuit designed to provide high voltage, high current pulses 18 nanoseconds in length at a frequency of up to 2.5 megahertz. The availability of super bright light emitting diodes with a wavelength of 630 to 640 nanometers allows us to record fiducial pulses, at streaking speeds in excess of 20 mm per microsecond, on all the black and white films commonly used in high speed photography. The time marks on the film record are references to the real time of the experiment from a clock-driver that controls the start and frequency of the fiducial pulse train and by three adjustable and discreet blanked fiducials. This paper discusses the development of this system and describes the full setup as used at LLNL.

Citation Download Citation

Larry L. Shaw, Steven A. Muelder, and Anthony T. Rivera "Slit-mounted LED fiducial system for rotating mirror streak cameras", Proc. SPIE 1539, Ultrahigh- and High-Speed Photography, Videography, and Photonics '91, (1 January 1992); https://doi.org/10.1117/12.50563

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