Stereolithography apparatus having a detection unit for optical adjustment and image modification

A technology of stereolithography and detection unit, which is applied in the field of calibration technology of stereolithography equipment

Pending Publication Date: 2021-07-23
DENTSPLY SIRONA INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the stability of the magnification and the relative correctness of the object size are from time to time controlled by the user by generating calibration volumes and measuring them

Method used

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  • Stereolithography apparatus having a detection unit for optical adjustment and image modification
  • Stereolithography apparatus having a detection unit for optical adjustment and image modification
  • Stereolithography apparatus having a detection unit for optical adjustment and image modification

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Embodiment Construction

[0085] Figure 4 A stereolithography apparatus ( 1 ) according to a first embodiment is shown during the generation process of a three-dimensional object. Such as Figure 4A stereolithography apparatus (1) is shown having a machine chamber (1a) for stepwise and / or continuous generation of at least one three-dimensional object (2). A three-dimensional object (2) is generated from a photocurable substance (3) stored inside the barrel (1b). The photocurable substance (3) is in fluid form and can have various consistencies, for example also in the form of a paste. , the photocurable substance (3) is attached to the platform (1c) after it has cured. The platform (1c) can be driven up or down relative to the tub (1b) by at least one motor and actuator (1d). All processes in the stereolithography apparatus (1) are controlled and adjusted by the control unit (6). The stereolithography apparatus (1) also has an interface for wireless and / or wired communication with the CAD CAM mod...

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PUM

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Abstract

A stereolithography apparatus (1) for generating a three-dimensional object (2), comprising: an optical unit (4) for projecting an image towards the photocurable substance (3) for hardening the photocurable substance (3) deposited in the focus layer (5); a control unit (6), characterized by further comprising: a detection unit (7) which comprises: a detection means (8) movably arranged in a detection region (9) for detecting during the generation process or in a generation-pause the image projected by the optical unit (4) and for outputting a detection signal; and a first driving means (10) for moving the detection means (8) into or out of the detection region (9), wherein the optical unit (4) comprises: a second driving means (11) linked to the optical unit (4) for moving the focus layer (5) into or out of the detection region (9), wherein the control unit (6) adjusts the optical unit (4) and / or modifies the image to be projected based on the signal indicative of the detected image.

Description

technical field [0001] The present invention relates to stereolithography apparatus. The invention more particularly relates to calibration techniques for stereolithography apparatus. Background technique [0002] Stereolithography equipment is used in the process of manufacturing three-dimensional objects of desired shape by exposing a photocurable substance, such as a liquid monomer, stepwise or continuously with layered images, which can be obtained, for example, through a digital mask or Generated by scanning of a laser beam. The basic principles of stereolithography are also often referred to as rapid prototyping or 3D printing. For stereolithography fabrication processes, in addition to creating pixel-based displays of digital masks, laser beams combined with steerable micromirrors can be used to project layered images, especially pixel-based layered A reference surface in a curing substance so that it hardens gradually or continuously. The reference surface is def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B33Y30/00G03F7/20B33Y50/02B29C64/129B29C64/232B29C64/241B29C64/393B29C64/236
CPCG03F7/70416B33Y30/00B33Y50/02B29C64/129B29C64/232B29C64/236B29C64/241B29C64/393B29C64/135B33Y10/00
Inventor T·米哈利卡C·什曼特F·巴斯勒
Owner DENTSPLY SIRONA INC
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