METHOD AND DEVICE FOR DRILLING HOLES USING CO2 LASER PULSES

摘要

The invention relates to a CO2 laser drilling method for drilling bores and a device for carrying out said method using a CO2 laser while at the same time protecting constructional elements such as surfaces that are disposed opposite the drill hole at a small distance (mm range) from detrimental influences such as heating up, melting or even evaporation caused by the radiation passing through the drill hole. The inventive method is characterized by generating radiation pulses or radiation pulse sequences based on the radiation (2) of the CO2 laser (1) outside the laser resonator; subjecting the surrounding of the focal spot (26) to a constant blow of working gas or protective gas; suppressing radiative feedback between the work piece and the CO2 laser (1) by means of a wavelength-selective decoupling unit (4); and protecting constructional elements of the component disposed opposite the drill hole (28) from undesired effects caused by the residual radiation (29) passing through the drill bore using a liquid (15) that flows along the underside of the treated work piece.