Invention Grant
- Patent Title: Method for the construction of a shaped body
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Application No.: US14424133Application Date: 2013-08-21
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Publication No.: US09764513B2Publication Date: 2017-09-19
- Inventor: Jürgen Stampfl , Johannes Homa , Johannes Patzer , Gerald Mitteramskogler , Jörg Ebert , Jürgen Laubersheimer , Wolfgang Wachter
- Applicant: Ivoclar Vivadent AG
- Applicant Address: LI Schaan AT Vienna
- Assignee: Ivoclar Vivadent AG,Technische Universität Wien
- Current Assignee: Ivoclar Vivadent AG,Technische Universität Wien
- Current Assignee Address: LI Schaan AT Vienna
- Agent Ann M. Knab; Thad McMurray
- Priority: EP12182047 20120828
- International Application: PCT/EP2013/067375 WO 20130821
- International Announcement: WO2014/033027 WO 20140306
- Main IPC: G06F17/00
- IPC: G06F17/00 ; B29C67/00 ; B33Y10/00 ; B33Y50/02 ; B29L9/00

Abstract:
The invention relates to a method for the construction of a shaped body from photopolymerizable material by using lithography-based generative production, in which a layer of liquid photopolymerizable material is defined on a production platform, and is polymerized in an exposure region having a predetermined contour, a further layer of photopolymerizable material is defined, the layer defined last is polymerized in an exposure region having a predetermined contour for the layer defined last, and the latter two steps are repeated until a shaped body having a predetermined shape has been formed by the sequence of cured layers with contours predetermined layer by layer, each exposure in an exposure region having a predetermined contour being carried out by controlled activation of individual exposure elements in a two-dimensional array of exposure elements, each exposure element being assigned an image element, wherein the exposure of the exposure region is carried out by a common light source and by a two-dimensional light intensity modulator which is illuminated by the light source and which has a grid of individually controllable intensity modulators, in such a way that each illuminated intensity modulator forms and exposure element that exposes an image element in the exposure region, wherein a two-dimensional matrix is compiled for each exposure step of a layer, each element of the matrix being assigned to an exposure element in the array of exposure elements and control instructions for this exposure element being obtained in the form of a time-dependent function which individually establishes the intensity profile of the radiation of the exposure element over the exposure step, characterized in that, if a component of the intensity variation common to all time-dependent function of the intensity profiles of all exposure elements to be activated exists as a general intensity variation in an exposure step, this general intensity variation is carried out by controlling the intensity of the light source in accordance with the general intensity variation.
Public/Granted literature
- US20150258732A1 METHOD FOR THE CONSTRUCTION OF A SHAPED BODY Public/Granted day:2015-09-17
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