Observation by image converter camera of focusing shock wave propagated from water to silicone oil

M. Tada; M. Yoshii; T. Tsuji; Kohji Isuzugawa

doi:10.1117/12.209551

30 May 1995 Observation by image converter camera of focusing shock wave propagated from water to silicone oil

M. Tada, M. Yoshii, T. Tsuji, Kohji Isuzugawa

Proceedings Volume 2513, 21st International Congress on: High-Speed Photography and Photonics; (1995) https://doi.org/10.1117/12.209551
Event: High-Speed Photography and Photonics: 21st International Congress, 1994, Taejon, Korea, Republic of

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.

Citation Download Citation

M. Tada, M. Yoshii, T. Tsuji, and Kohji Isuzugawa "Observation by image converter camera of focusing shock wave propagated from water to silicone oil", Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); https://doi.org/10.1117/12.209551

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