An Explosive Light Source of Low Energy for 30-Nanosec Schlieren or Shadowgram Photography
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.
- Print ISSN
- 0361-4573
- Published
- 1965-02
- Content type
- Original Research
- DOI
- 10.5594/J09263
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