Patent ID: 6600129
Filing Date: 2003-07-29
Classification: B22F,B29C,B33Y,Y02P

Abstract:
A device for sintering a powder with a laser beam, comprising:a device for production of a laser beam (L), which beam impinges upon the upper surface of a powder (P) along a moveable sinter position (S), a device for detecting, along a moveable detection position V(E), the temperature of the powder (P) in the area of the sinter position (S), a device for regulating the laser beam (L), which regulates the output of the laser beam (L) depending upon a signal output by the device for detecting the temperature of the powder (P), wherein the device further comprises a device for compensating for position-dependent errors in temperature detection, which device for compensating takes into consideration at least one of the following sources of error depending upon the position of the detection area on the upper surface:of, the powder: the change in the geometry of the moveable detection area (E), the chromatic error due to the difference in the bundling strength with the employed optical system with the differing wavelengths of the laser beam and the thermal radiation, the adjustment errors which occur during the co-axial adjustment of the laser and thermal beams.