Patent ID: 8623264

Claim:
A method for processing light-polymerizable material ( 5 ; 55 ; 105 ) for building up an object ( 27 ), using a lithography-based generative fabrication technique, in which a layer ( 28 ) of a light-polymerizable material ( 5 ; 55 ; 105 ), which is located in at least one vat ( 4 ; 54 ; 104 ) with transparently or translucently formed, horizontal bottom ( 6 ; 56 ; 106 ), is polymerized on at least one horizontal build platform ( 12 ; 62 ), the horizontal build platform ( 12 ; 62 ) protruding into the at least one vat ( 4 ; 54 ; 104 ), with predetermined geometry by exposure in an exposure area, the build platform ( 12 ; 62 ) is displaced vertically for forming of a subsequent layer, light-polymerizable material ( 5 ; 55 ; 105 ) is newly fed under a layer ( 28 ) last formed, and by repeating the previous steps, the object ( 27 ) is built up in layers in a form, which results from a sequence of layer geometries, wherein the at least one vat ( 4 ; 54 ; 104 ) can be moved horizontally into a feed position, a feed device ( 8 ) discharges light-polymerizable material ( 5 ; 55 ; 105 ) at least onto the exposure area of at least one vat bottom ( 6 ; 56 ; 106 ) before the at least one vat ( 4 ; 54 ; 104 ) is moved into an exposure position, in which the exposure area is located below the build platform ( 12 ; 62 ) and above an exposure unit ( 10 ; 60 ), and exposure takes place, wherein a layer thickness of the material ( 5 ; 55 ; 105 ) is set by a distance between the build platform ( 12 ; 62 ) and the at least one vat bottom ( 6 ; 56 ; 106 ) with the aid of a lifting mechanism ( 14 ; 64 ; 114 ), which, after renewed feeding of light-polymerizable material, lowers the build platform ( 12 ; 62 ) with layers formed on the build platform, again into a newly fed light-polymerizable material ( 5 ; 55 ; 105 ), so that light-polymerizable material is displaced from a remaining intermediate space with respect to the at least one vat bottom ( 6 ; 56 ; 106 ), and a remaining distance between a lowered lower surface and the vat bottom is set in a manner under control of a control unit ( 11 ; 61 ).