Method of aligning pixelated light engines
US11390036B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Nov 7, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C64/277
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A three-dimensional printing system is for fabricating or manufacturing a three-dimensional article. The three-dimensional printing system includes a substrate, a light engine, a radiation sensor, and a controller. The substrate has a surface positioned proximate to a build field. The surface supports a calibration target which includes or defines elongate light modulating bars disposed at two different orientations and including a Y-bar aligned with a Y-axis and an X-bar aligned with an X-axis. The light engine includes a plurality of projection modules including at least a first projection module and a second projection module. The first projection module configured to project an array of pixels onto a first image field. The second projection module configured to project an array of pixels onto a second image field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.