A LASER MICROPROJECTOR NON-DESTRUCTIVE CONTROL METHOD FOR SURFACE CRACKS

摘要

A laser microprojector method is introduced within the non-destructive visual inspection methods for surface testing. A contracted and collimated laser beam is projected onto a surface to be inspected, and its reflection expanded, projected onto a screen and examined. The surfaces of the used wood-machining tools are used for light reflection, rendering examples of unhomogeneous structures with the only regularities corresponding to light diffraction on the traces of the tool wear.