Optical image scanner with moveable calibration target
US7433097B2 · kind B2 · utility
9Cited by
27References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2003 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Feb 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/401
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanner has a calibration target that can be moved in front of the scanline during a scan. This enables multiple calibrations during a scan. A full-color calibration can be performed during scanning without the need for a separate array of photosensors. Scanning can start as soon as the lamp provides sufficient light for scanning, without waiting for the lamp to stabilize. It is not necessary to keep the lamp on, or to keep the lamp warm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.