Noncontact Ultrasonic Imaging of Subsurface Defects Using a Laser-Ultrasonic Technique
Noncontact Ultrasonic Imaging of Subsurface Defects Using a Laser-Ultrasonic Technique
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使用激光超声技术对地下缺陷进行非接触式超声成像
DOI：
10.1143/jjap.35.3075
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Yoshihisa Tanaka Yoshihisa Tanaka
中科院分区：
文献类型：
--
作者：
H. Yamawaki;Tetsuya Saito;H. Fukuhara;C. Masuda;Yoshihisa Tanaka Yoshihisa Tanaka
非接触超声成像的亚表面缺陷，使用激光超声技术进行了演示。采用脉冲激光辐照产生超声波，并采用光外差干涉法检测试样表面的超声波振动。在粘结层上具有宽度为1.5mm的字符形标记的粘结薄板被用作试样。进行了超声波透射和反射模式下的成像，并演示了不仅使用XY扫描试样，而且使用激光束扫描仪的成像。通过实验获得了位于试样表面以下0.2 mm处的标记的超声图像。
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.