title: Opto-ultrasonic sounding system.
abstract: A new combination of pulsed ultrasonic waves and laser light with proper signal processing techniques is shown as a means of nondestructive testing. This method is suitable for inspection of the conditions in narrow, long regions, such as inside a pipe. The construction and basic experimental results are shown, and the effects of the signal processing are emphasized. As typical of the sensitivity of the system, an object 3 mm high placed at a 500-mm distance from the open aperture of a 26-mm diam pipe could be detected.
authors.forename: T
authors.initials: T
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Tsujimura
authors.forename: M
authors.initials: M
authors.lastname: Ueda