Contactless material investigation by laser - illuminating by pulsed laser with variable radiated energy density, pressure or acoustic sensor.

摘要

Signals are used from a pressure or acoustic sensor which is not in contact with the material. A pulsed laser can be used with variable radiated energy density. The radiated density can be varied by varying the pulse duration, amplitude or focussing. USE/ADVANTAGE - Material investigation or controlling laser processing of materials, esp. removal of material by laser beam. Can be applied in atmospheric conditions and in real time with high positional resolution.