LASER SURFACE CLEANING METHOD Russian patent published in 2015 - IPC B23K26/36 

FIELD: physics, optics.

SUBSTANCE: method can be used to remove different types of dirt from the surface of industrial and processing facilities. The method comprises scanning the corroded surface of an object multiple times in multi-pulse mode with a formed beam of laser radiation; detecting, in continuous mode, the spectrum of the plasma formed during removal of dirt; detecting iron lines and oxygen lines in the obtained plasma spectrum for the surface being cleaned and/or for the dirt; measuring the intensity values of said spectral lines and calculating the intensity ratio of the oxygen spectral line to the iron spectral line. If the intensity ratio of the selected spectral lines is greater than 0.5, the power of the laser beam is reduced and if the value is less than 0.5, the surface is considered clean.

EFFECT: method increases efficiency, monitoring and controllability of the cleaning process, as well as the safety of the process for laser removal of surface dirt.

4 dwg