Process for the production of a three-dimensional object with resolution improvement by pixel-shift
US7962238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2010 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jul 30, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y50/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process or device for the production of a three-dimensional object by layer-wise solidification of a material which is solidifiable under the application of electromagnetic irradiation by means of mask illumination, wherein the mask is produced using an image forming unit having a prescribed resolution, which is formed from a constant number of image forming elements (pixels) being discrete and being arranged in a spatially mutually fixed manner. For the improvement of the resolution along the outer and inner contours of the sectional areas of the object to be generated layer-wise in the sub-pixel range, a multiple illumination per layer is performed, which consists of a series of multiple images that are mutually shifted in the sub-pixel range in the image/construction plane, wherein a separate mask/bitmap is produced for each shifted image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.