LASER ULTRASONIC FLAW DETECTION APPARATUS

摘要

Disclosed is a laser ultrasonic flaw detector wherein laser light having a single kind of wavelength (?0) which is emitted from a laser light source (11) is converted by a wavelength shifter (12) to laser light including at least two kinds of wavelengths (?1, ?2), and is divided by a branching filter (13) into the laser light having the first wavelength (?1) and the laser light having the second wavelength (?2). The output and the pulse width of the laser light having the first wavelength (?1) are adjusted by a first controller (14) so as to become suited for generating an ultrasonic vibration without causing damage to an object (100) to be inspected. The output and the pulse width of the laser light having the second wavelength (?2) are adjusted by a second controller (15) so as to become suited for detecting the above-mentioned ultrasonic vibration. The laser lights are unified into a single laser light by a multiplexer (16) and irradiated onto the surface of the object (100) to be inspected.