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

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 70, No. 7, pp. 522–527
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
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J14350
Author(s): George A. TheophanisAvco Research and Advanced Development Div., Wilmington, Mass.
Copyright: © 1961 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. High-Speed Photography, Reprint Vols. 1–6, Society of Motion Picture and Television Engineers, 1948–1957 . EXTERNAL
10. Zarem A. M. Marshal F. R. Hauser S. M. , Rev. Sci. Instr. , 29 : 1041 – 1044 , 1958 . EXTERNAL
2. Proc. 2nd International Congress on High-Speed Photography , Dunod, 92 rue Bonaparte, Paris 6, 1956 . EXTERNAL
3. Proc. 3rd International Congress on High-Speed Photography , Butterworlhs Publications, Ltd. 88 Kingsway, London W.C.2; in U. S. by Academic Press Inc., Ill Fifth Ave., New York 3, 1956 . EXTERNAL
4. Courtney-Pratt J. S. , Reports on Progress in Physics , 20 : 397 – 432 , 1957 . EXTERNAL
5. Hull J. A. , “A technique for obtaining submicrosecond exposure times at large aperture in high-speed photography,” Univ. of New Mexico , M.S.E.E. Thesis, 1956 . EXTERNAL
6. Hull J. A. , IRE National Convention Record , Part 5: 228 , 1958 . EXTERNAL
7. Craggs J. D. Haine M. E. Meek J. M. , Jour. Inst. Elec. F.ngrs. , IIIA , 93 , 963 – 976 , London, 1946 . EXTERNAL
8. Theophanis G. A. , Rev. Sci. Instr. , 31 : 427 – 432 , 1960 . EXTERNAL
9. Hull J. A. Theophanis G. A. , “Ballistics-range applications of millimicrosecond photography,” Jour. SMPTE , 60 : 355 – 357 , May 1960 . EXTERNAL

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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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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>
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