Patent ID: 9527246
Filing Date: 2016-12-27
CPC Classification: B22F,B23K,B29C,B33Y,Y02P

Claim Text:
1. An optical irradiation device for a system for producing work pieces by irradiation of powder layers of a powdered raw material using laser radiation, comprising: a multimode optical fiber suitable for a central wavelength of a beam of light for multimode guidance having a first beam profile and entering through an input connection, the multimode optical fiber having a cut-off wavelength that is greater than the central wavelength of the beam of light; and a switching device which is selectively switchable between a first light conducting state and a second light conducting state, wherein the switching device is configured to conduct the beam of light having a first beam profile and entering through the input connection in the first light conducting state to an output connection, such that the beam of light has the first beam profile on emerging from the output connection, and to conduct the beam of light having the first beam profile and entering through the input connection in the second light conducting state to the output connection by means of selective redirection of the beam of light through the multimode optical fiber such that the beam of light has a second beam profile which is different from the first beam profile on emerging from the output connection by the multimode guidance in the multimode optical fiber, wherein a characteristic width of the first beam profile in a lateral intensity distribution of the first beam profile is narrower than a characteristic width of the second beam profile in a lateral intensity distribution of the second beam profile.