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Proceedings Paper

Observation by image converter camera of focusing shock wave propagated from water to silicone oil
Author(s): M. Tada; M. Yoshii; T. Tsuji; Kohji Isuzugawa
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Paper Abstract

A spherical shock wave induced by an under water spark discharge at the first focal point of a semiellipsoid or a reflector, converges near the second focal point and a high pressure is locally produced. This phenomenon is applied to disintegrators of kidney stone by extracorporeal shock waves on the assumption that the acoustic characteristics in human tissue are very similar to those in water. But the behavior of the shock wave which propagates from water to human tissue has been unknown still now. In this paper, we observe the behavior of the shock waves which propagates through two kinds of media, that is, water and silicone oil and its photographs are taken with a high-speed camera (image converter camera) by means of the schlieren system. Besides, a semiellipsoid is modified to make the spherical shock wave produced at its focal point converge at its second one taking account of the refraction at the boundary between water and silicone oil. The result that it is possible to make the spherical shock wave converge across the boundary between water and silicone oil with the modified semiellipsoid is obtained.

Paper Details

Date Published: 30 May 1995
PDF: 7 pages
Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); doi: 10.1117/12.209551
Show Author Affiliations
M. Tada, Osaka Univ. (Japan)
M. Yoshii, Osaka Univ. (Japan)
T. Tsuji, Osaka Univ. (Japan)
Kohji Isuzugawa, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 2513:
21st International Congress on: High-Speed Photography and Photonics
Ung Kim; Joon-Sung Chang; Seung-Han Park, Editor(s)

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