An LED Illuminator For High Strain Rate Materials Studies

Lee A. Cross; Edward A. Strader

doi:10.1117/12.944498

2 November 1984 An LED Illuminator For High Strain Rate Materials Studies

Lee A. Cross, Edward A. Strader

Proceedings Volume 0497, High Speed Photography, Videography, and Photonics II; (1984) https://doi.org/10.1117/12.944498
Event: 28th Annual Technical Symposium, 1984, San Diego, United States

Abstract

A light-emitting diode (LED) based illuminator system for use with a split Hopkinson bar (tensional Hopkinson bar) has been developed. Back-lit photographic images of samples undergoing rapid elongation at high strain rates can be recorded at framing rates up to 50 kHz. The photography is "shutterless," that is, the camera employed had no motion compensating optics or shutter. The framing of the camera was achieved by the short pulse duration of the light source. A simple rotating drum camera spinning up to 300 rps was used to record a sequence of several hundred images on a strip of 35 mm film 87 cm long.

Citation Download Citation

Lee A. Cross and Edward A. Strader "An LED Illuminator For High Strain Rate Materials Studies", Proc. SPIE 0497, High Speed Photography, Videography, and Photonics II, (2 November 1984); https://doi.org/10.1117/12.944498

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