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1. (WO2018104885) STEREOLITHOGRAPHY MACHINE WITH IMPROVED OPTICAL GROUP

Pub. No.:    WO/2018/104885    International Application No.:    PCT/IB2017/057693
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Thu Dec 07 00:59:59 CET 2017
IPC: B29C 67/00
B33Y 80/00
B33Y 10/00
B33Y 30/00
B29C 64/135
B29C 64/129
B29C 64/20
B29C 64/40
Applicants: DWS S.R.L.
Inventors: COSTABEBER, Ettore, Maurizio
Title: STEREOLITHOGRAPHY MACHINE WITH IMPROVED OPTICAL GROUP
Abstract:
A stereolithography machine (1) for making a three-dimensional object (O) that comprises a container (2) for a fluid substance (R), a source (3, 31, 32) of the predetermined radiation (RL, RL1, RL2), an optical group (4) configured to direct the radiation (RL, RL1, RL2) towards a reference surface (SR) of the fluid substance (R), and a control logic unit (5) configured to control the optical group (4) and/or the radiation source (3, 31, 32) so as to expose at least one portion of the reference surface (SR) to the radiation (RL, RL1, RL2). The stereolithography machine provides that the optical group (4) comprises a first optical sub-group (41) configured to be exposed to the radiation (RL, RL1, RL2) so as to instantaneously project the image of a first portion to be solidified onto the reference surface (SR) and a second optical sub-group (42) configured to selectively convey the radiation (RL, RL1, RL2) towards a point of the reference surface (SR) and to move such a point so as to progressively expose a second portion to be solidified of the reference surface (SR).stereolithography machine with improved optical group