Optical Computerized Tomography for Visualization of Ultrasonic Fields Using Michelson Interferometer
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概要
- 論文の詳細を見る
We propose a method for the noncontact visualization of ultrasonic fields using the Michelson interferometer and optical computerized tomography (O-CT). The light source of the interferometer is a He–Ne laser. The test light passing through radiated sound fields is interfered by the reference light. Therefore, the index of refraction gradient including sound pressure information is transformed into the intensity of the interference light that can be electrically acquired by an avalanche photo-diode. Projection data along the optical axis is obtained by single linear scanning in the range of $\pm 32$ mm and electronically quadrature-detected as complex amplitude. Thirty-six projections are acquired in the range of $0\leq\theta<\pi$ (rad), and complex sound fields are reconstructed in a region of $64\times 64$ mm2 by CT. The experimental results are in agreement with the numerical results.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-09-15
著者
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Masuyama Hiroyuki
Electronic Mechanical Engineering Department Toba National College Of Maritime Technology
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OBUCHI Takeshi
College of Engineering Systems, University of Tsukuba
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NAKANISHI Satoshi
Graduate School of Systems and Information Engineering, University of Tsukuba
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Obuchi Takeshi
College of Engineering Systems, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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Mizutani Koichi
Graduate School of System and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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