Laser printing system
US10518555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2014 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Aug 7, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/225
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention describes a laser printing system (100) for illuminating an object moving relative to a laser module of the laser printing system (100) in a working plane (180) and a corresponding method of laser printing. The laser module comprises at least two laser arrays (110) of semiconductor lasers (115) and at least one optical element (170). The optical element (170) is adapted to image laser light emitted by the laser arrays (110), such that laser light of semiconductor lasers (115) of one laser array (110) is imaged to one pixel in a working plane (180) of the laser printing system (100) and an area element of the pixel is illuminated by means of at least two semiconductor lasers (115). The optical element does not project or focus laser light of each single semiconductor laser (115) to the working plane (180) but images the whole laser arrays to the working plane. The overlap of the laser light emitted by the semiconductor lasers (115) may improve the homogeneity of illumination or energy input and the reliability regarding malfunctions of single semiconductor lasers (115).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.