A Kerr-Cell Camera with Synchronized Light Source for Millimicrosecond Reflected Light Photography

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Certain events which can be studied photographically have associated with them a high degree of self-luminosity. To study the surface phenomena of these events, a high resolution, 50-mμsec Kerr cell camera and synchronized light source have been developed. A three-polarizer Kerr cell, having an optical transmission ratio of better than 106:1, is employed to prevent undesired exposure of the film due to the relatively long duration light from the self-luminosity which would bleed through a standard two-polarizer cell when closed. The cell is activated by means of a transmission line pulse generator capable of producing a 60,000-v square-wave pulse. The light source consists of three commercial xenon filled flash-tubes which are energized by means of a hydrogen thyratron pulser. A transmission line network is incorporated into the flashtube pulser to produce a high-voltage synchronizing pulse when the flashtubes are ignited. This pulse is applied, via a length of delay cable, to the trigger electrode, of the spark-gap switch which activates the Kerr cell shutter. Synchronization is accomplished with an accuracy of 5 μsec. The camera has been used to photograph the early stages of electrically exploded metal foils, and hypervelocity impacts in a ballistics range.
Publication Date: 1961-07-01
DOI: 10.5594/J14350
Link: https://doi.org/10.5594/J14350
Author(s): George A. Theophanis

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George A. Theophanis; A Kerr-Cell Camera with Synchronized Light Source for Millimicrosecond Reflected Light Photography, Journal of the SMPTE ( Volume: 70, Issue: 7, July 1961); SMPTE, 1961. Available at https://doi.org/10.5594/J14350

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George A. Theophanis; A Kerr-Cell Camera with Synchronized Light Source for Millimicrosecond Reflected Light Photography, Journal of the SMPTE ( Volume: 70, Issue: 7, July 1961); SMPTE, 1961. Available at https://doi.org/10.5594/J14350

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<span class="citation">George A. Theophanis; <cite>A Kerr-Cell Camera with Synchronized Light Source for Millimicrosecond Reflected Light Photography</cite>, Journal of the SMPTE ( Volume: 70, Issue: 7, July 1961); SMPTE, 1961. Available at <a href="https://doi.org/10.5594/J14350" target="_blank" rel="noopener">https://doi.org/10.5594/J14350</a></span>

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<li>
George A. Theophanis; <cite id="bib-10-5594-j14350">A Kerr-Cell Camera with Synchronized Light Source for Millimicrosecond Reflected Light Photography</cite>, Journal of the SMPTE ( Volume: 70, Issue: 7, July 1961); SMPTE, 1961
<span class="doi">10.5594/J14350</span>
</li>