Eos Gmbh Electro Optical Systems

3d Systems, Inc.

Jurgen Serbin

Hans J Langer

Peter Wolff

Gabriele Krug

Christian Wilkening

Johannes Reichle

Guido Hornig

Andreas Ronner

Apparatus and method for producing an object using stereolithography

In a method for calibrating the deflection control of a laser beam a light-sensitive medium (5) is exposed to a laser beam (2) at predetermined positions for generating a test pattern (20), thereafter digitized partial pictures of pattern portions (21) of the test pattern (20) are produced and the digitized partial pictures are composed to a digitized overall picture of the test pattern (20). The correction data for the control (4) for deflecting the laser beam (2) are calculated on the basis of a comparison of actual positions of the laser beam (2) on the digitized overall picture with predetermined desired coordinates.

Method and apparatus for calibrating a control apparatus for deflecting

Method and apparatus for producing a three-dimensional object

An apparatus for producing an object using stereolithography includes a container, a bath of a liquid or powder material filling the container and having a free surface, the material being solidifiable under the action of electromagnetic radiation, a support for positioning the object relative to the free surface of the bath so as to form a layer of the material adjacent to the free surface, a device for solidifying the layer using electromagnetic radiation, a wiper device extending along a first direction across the free surface and drive means for moving the wiper device across the free surface along a second direction. In order to achieve optimum wiping conditions the wiper device has a leading first surface portion and a trailing second surface portion when moving along the second direction, the first and second surface portions extending in the first direction, the first surface portion having a first surface tension value and the second surface portion having a second surface tension value different from the first surface tension value.

Apparatus for producing an object using stereolithography

Growing community of inventors

Grafelfing, Germany

Jurgen Serbin