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Optical penetration sensor for pulsed laser welding

United States Patent

6,075,220
June 13, 2000
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
An apparatus and method for determining the penetration of the weld pool created from pulsed laser welding and more particularly to an apparatus and method of utilizing an optical technique to monitor the weld vaporization plume velocity to determine the depth of penetration. A light source directs a beam through a vaporization plume above a weld pool, wherein the plume changes the intensity of the beam, allowing determination of the velocity of the plume. From the velocity of the plume, the depth of the weld is determined.
Essien; Marcelino (Albuquerque, NM), Keicher; David M. (Albuquerque, NM), Schlienger; M. Eric (Albuquerque, NM), Jellison; James L. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
09/ 135,513
February 12, 1998
This invention was made with Government support under Contract No. DE-AC04-94AL85000 awarded by the Department of Energy. The Government has certain rights in the invention.