procedures for quality assurance in laserstrahlschweissen and cutting.

摘要

PCT No. PCT/EP90/00412 Sec. 371 Date Aug. 8, 1991 Sec. 102(e) Date Aug. 8, 1991 PCT Filed Mar. 14, 1990 PCT Pub. No. WO90/10520 PCT Pub. Date Sep. 20, 1990.Method for on-line quality assurance when processing materials with laser energy by means of electro-optical detection of the near-infrared radiation of the material which is thrown out of the "key-hole" during the material processing operation with laser, thus detecting the dimension of hollows (pores, holes) which have arisen in the workpiece. The detection of the thermal radiation of the thrown out material is effected in a wavelength of 800 nm up to approximately 1300 nm, preferably with simultaneous detection of the ultraviolet radiation of the plasma could in a preferred wavelength of approx. 200 nm up to 450 nm. Finally, there is also a description of the processing procedure for near-infrared signals.