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Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965)
[ACTIVE]

An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Volume
74, No. 2, pp. 90–94
Abstract
A short-duration light source to substitute for a spark gap in schlieren or shadowgram photography is described. Having a spot diameter of 4.4 mm, the flash delivers 90% of its total illumination in about 30 nanosec. The explosive system is equivalent to a small electric detonator containing 0.1–0.3 gram of PETN. The total energy of 500 to 1,500 j is sufficiently small to allow handling with relative safety. A simple container to protect operator and equipment is described. The short flash-duration and uniformly reproducible spot size of this type of light source make it attractive for stopping the motion of fast objects and shock waves.
Publication Date
1965-02-01
DOI
10.5594/J09263
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J09263
Author(s)
T. P. LiddiardU.S. Naval Ordnance Laboratory, White Oak, Silver Spring, Md. 20903
S. J. JacobsU.S. Naval Ordnance Laboratory, White Oak, Silver Spring, Md. 20903
I. KabikU.S. Naval Ordnance Laboratory, White Oak, Silver Spring, Md. 20903
Copyright
© 1965 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1. Schardin H. , “Das Toeplersche schlieren-ver fahren,” (Toepler's schlieren method) , For-schungsheft , 367 , Ausgabe B, Band 5 , VDI-Verlag GmbH , Berlin , (July/Aug 1934 ); translated in Translation No. 156, The David Taylor Model Basin (July 1947). EXTERNAL
  • 2. Fischer Heinz , “Millimicrosecond light source,” Proc. 5th Int. Congress on High-Speed Photography, SMPTE , 9 E. 41 St., New York, N.Y. , 10017 , p. 13 ( 1962 ). EXTERNAL
  • 3. Fischer Heinz Gallagher C. C. Tandy Peter , “Improved nanosecond light sources,” Proc. 6th International Congress on High-Speed Photography, H. D. Tjeenk Willink & Zoon , Haarlem, The Netherlands , p. 152 , ( 1963 ). EXTERNAL
  • 4. Michel-Lévy Muraour H. , Comp. Rend. , 204 : 576 ( 1937 ). EXTERNAL
  • 5. Cole R. H. , Underwater Explosions , Princeton Univ. Press , Princeton, N.J. , p. 213 ( 1948 ). EXTERNAL
  • 6. Deffet L. Vanden Berghe R. , “Use of high-explosive flash for photography by the Schardin System,” Proc. 5th International Congress on High-Speed Photography, SMPTE , 9 E. 41 St., New York, N.Y. 10017 , p. 49 ( 1962 ). EXTERNAL
  • 7. Walsh J. M. Christian R. H. , “Equation of state of metals from shock wave measurements,” Phys. Rev. , 97 : p. 1544 ( 1955 ). EXTERNAL
  • 8. Plauson R. A. Mallory H. D. , “Extinction of gas shock luminosity against transparent surfaces,” J. Appl. Phys. , 35 : p. 502 ( 1964 ). EXTERNAL
  • 9. Lunn G. H. , “Flash light source measurement,” Proc. 5th International Congress on High-Speed Photography, SMPTE , 9 E. 41 St., New York, N.Y. 10017 , p. 63 ( 1962 ). EXTERNAL
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T. P. Liddiard, S. J. Jacobs, and I. Kabik; An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography, Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965); SMPTE, 1965. Available at https://doi.org/10.5594/J09263
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T. P. Liddiard, S. J. Jacobs, and I. Kabik; An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography, Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965); SMPTE, 1965. Available at https://doi.org/10.5594/J09263

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T. P. Liddiard, S. J. Jacobs, and I. Kabik; An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography, Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965); SMPTE, 1965. Available at https://doi.org/10.5594/J09263
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<span class="citation">T. P. Liddiard, S. J. Jacobs, and I. Kabik; <cite>An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography</cite>, Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965); SMPTE, 1965. Available at <a href="https://doi.org/10.5594/J09263" target="_blank" rel="noopener">https://doi.org/10.5594/J09263</a></span>

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T. P. Liddiard, S. J. Jacobs, and I. Kabik; An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography, Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965); SMPTE, 1965
doi: 10.5594/J09263
url: https://doi.org/10.5594/J09263
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<li>
T. P. Liddiard, S. J. Jacobs, and I. Kabik; <cite id="bib-10-5594-j09263">An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography</cite>, Journal of the SMPTE ( Volume: 74, Issue: 2, February 1965); SMPTE, 1965
<span class="doi">10.5594/J09263</span>
</li>

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