Visualization of Micro-scale Surface Forming Process by Infrared Pulse Laser Heating

In this paper, surface forming process on glass plate was studied by using pulsed CO2 laser irradiation. The process was visualized by a high speed camera. Surface forming process of humped lens-like surface that had 470 μm in diameter and 18.3 μm in height and ablated surface that had 522 μm in diameter and 3.2 μm in depth were visualized. In comparatively high laser intensity the center of lens-like surface ablate and the surface get dented.