LASER DOPPLER VIBRATION METER

摘要

PROBLEM TO BE SOLVED: To provide a laser Doppler vibration meter capable of outputting vibration of a measurement target as an acoustic signal allowing hearing through a headphone or the like. SOLUTION: In this laser Doppler vibration meter, a vibration state of the measurement target is taken out as an electric signal by making reference laser light comparison-interfere with reflected laser light from the measurement target. The laser Doppler vibration meter is provided with a means using the electric signal showing the vibration state of the measurement target as the acoustic signal to allow an operator to sense the vibration state of the measurement target on the basis of the acoustic signal.