Skewing compensation method and apparatus in a laser based image-forming system
US7382385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2005 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Sep 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0404
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Skew compensation apparatus for compensating for skew of a multi-beam scanning source, comprises: delay commencement detector(s) for detecting the start of a beam scanner position, position detectors for detecting the position of the multiple beams at a predefined interval following the commencement, so that the position indicates skew of the respective beam, and compensating electronics for automatically inserting a compensation for the skew by altering a delay into a timing signal for switching the respective beam. The commencement detector can be an existing start of scan detector and the apparatus can be built into the writing head, particularly at the conjugate location to the focal plane or at the focal plane of a laser printer or the like to provide a self-calibrating printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.