Noncontact Ultrasonic Imaging of Subsurface Defects Using a Laser-Ultrasonic Technique
スポンサーリンク
概要
- 論文の詳細を見る
Noncontact ultrasonic imaging of subsurface defects using a laser-ultrasonic technique was demonstrated. Pulsed laser irradiation was used for ultrasonic generation, and optical heterodyne interferometry was used for detection of ultrasonic vibration on the specimen surface. Bonded thin plates with character-shaped hallmarks with 1.5 mm width on bonding layer were used as specimens. Imagings in ultrasonic transmission and reflection modes were performed, and imagings using not only XY-scanning of specimens but also a laser beam scanner were demonstrated. Ultrasonic images of hallmarks located 0.2 mm below the specimen surface were obtained through the experiments.
- 1996-05-30
著者
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TANAKA Yoshihisa
National Institute for Materials Science (NJMS)
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MASUDA Chitoshi
National Research Institute for Metals
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Fukuhara Hiroaki
National Institute For Materials Science
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Yamawaki Hisashi
National Institute For Materials Science
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Saito Tetsuya
National Institute For Materials Science
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Yamawaki Hisashi
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba-shi, Ibaraki 305, Japan
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Saito Tetsuya
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba-shi, Ibaraki 305, Japan
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