公开(公告)号：US11820079B2

公开(公告)日：2023-11-21

申请号：US17433356

申请日：2020-03-11

Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Thomas Michalica ,  Christian Schmidt ,  Franz Basler

IPC: B29C64/393 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/232 ,  B29C64/236 ,  B29C64/241 ,  B29C64/129

CPC classification number: B29C64/393 ,  B29C64/129 ,  B29C64/232 ,  B29C64/236 ,  B29C64/241 ,  B33Y30/00 ,  B33Y50/02

Abstract: The present invention relates to a stereolithography apparatus for generating a three-dimensional object, comprising: an optical unit for projecting an image towards the photocurable substance for hardening the photocurable substance deposited in the focus layer; a control unit, characterized by further comprising: a detection unit which comprises: a detection means movably arranged in a detection region for detecting during the generation process or in a generation-pause the image projected by the optical unit and for outputting a detection signal; and a first driving means for moving the detection means into or out of the detection region, wherein the optical unit comprises: a second driving means linked to the optical unit for moving the focus layer into or out of the detection region, wherein the control unit adjusts the optical unit and/or modifies the image to be projected based on the signal indicative of the detected image.