Abstract: We describe a device for calibrating an irradiation system of an apparatus for producing a three-dimensional workpiece, the irradiation system comprising an irradiation unit for selectively irradiating an irradiation beam onto an irradiation plane, wherein the device comprises: a control unit configured to control the irradiation system to irradiate the irradiation beam onto the irradiation plane, and an optical detection unit coupled to the control unit, wherein the optical detection unit comprises an optical detector and an objective lens for optically detecting a portion of the irradiation plane, wherein the optical detection unit is configured to detect a position of a spot of the irradiation beam on the irradiation plane, wherein the objective lens is adapted to be arranged, with respect to an irradiation beam path of the irradiation beam, between the optical detector and an irradiation beam scanner of the irradiation system, wherein the optical detection unit is configured to detect the position of the

Abstract: A powder application arrangement for use in an apparatus for manufacturing work pieces by irradiating powder layers with electromagnetic radiation or particle radiation, the powder application arrangement comprises a carrier adapted to receive layers of a raw material powder and a work piece made of the raw material powder by a generative layer construction method. The powder application arrangement further includes a powder application device configured to deposit the raw material powder onto the carrier At least one camera is attached to the powder application device in such a position that it is capable of acquiring images of at least one of a surface of a raw material powder layer applied onto the carrier by means of the powder application device and a surface of the work piece made of the raw material powder by a generative layer construction method while the powder application device is moved across the carrier.

Abstract: The application relates to a device for producing three-dimensional workpieces, the device including: a structural surface designed to receive a molding compound; and an irradiation arrangement designed to selectively irradiate the molding compound on the structural surface with electromagnetic radiation, in order to produce a workpiece by means of generative layer construction, where the irradiation device comprises a plurality of irradiation units, the irradiation units being designed to irradiate an individual region of the structural surface respectively associated with the irradiation units, and where the beams emitted by the irradiation units respectively have a cross-sectional surface corresponding to between approx. 2% and approx. 170% of the surface of the respectively associated individual region. The application also relates to the use of such a device and to a method for producing three-dimensional workpieces by means of such a device.

Abstract: A powder application arrangement for use in an apparatus for manufacturing work pieces by irradiating powder layers with electromagnetic radiation or particle radiation, the powder application arrangement comprises a carrier adapted to receive layers of a raw material powder and a work piece made of the raw material powder by a generative layer construction method. The powder application arrangement further includes a powder application device configured to deposit the raw material powder onto the carrier At least one camera is attached to the powder application device in such a position that it is capable of acquiring images of at least one of a surface of a raw material powder layer applied onto the carrier by means of the powder application device and a surface of the work piece made of the raw material powder by a generative layer construction method while the powder application device is moved across the carrier.