Real-time optodynamic monitoring of pulsed laser decoating rate
Jezeršek, Matija ...
This paper deals with a laser-cleaning process for removing a layer of paint. The effects of each individual laser pulse were monitored by a three-probe system. Ultrasonic signals from the rear ...surface of the substrate were obtained using an arm compensated Michelson interferometer, the optoacoustic waves in the surrounding air were detected using a laser beam deflection probeand the shape of the growing crater was measured using a laser anamorph profilometer. Two different cleaning lasers were usedČ an Excimer and a Nd:YAGlaser. Typical parameters of the optodynamic signals versus the laser-pulse number are presented. A linear correlation between the quantity ofablated material and the integral of the ultrasonic signals was found together with an exponential relationship between the time-of-flight of the optoacoustic signals and the decoating rate.
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