We have researched laser processing of glass with nanosecond ultraviolet pulses. While manufacturing surface channels and subsurface markings, the values of pulse energy, pulse overlap through processing speed and number of passes over the laser processed area were changed. We have assessed, that an improvement in the smoothness of the channels was achieved by slowing down the process and raising the energy, but the latter had to be limited based on the presence of side effects and preserving depth. Inside the glass we have produced traces close to the size of a focused laser beam and came to a conclusion, that visibility is best raised by their blending. To succesfully reproduce a 5 mm tall 3D model inside the workpiece while preserving its details, we have limited the processing to the perimeters of the stacked layers.
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