Aligning beams over successive reflections by facets of rotating polygonal mirror
US8035675B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | May 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04786
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
First delay mechanisms to delay a beam-detect signal by different lengths of time in synchronization with a first clock signal. The beam-detect signal is generated responsive to one or more beams being output towards a rotating polygonal mirror having facets and directed towards a sensor. One or more second delay mechanisms each correspond to one of the beams to delay a second clock signal, resulting in a beam-clock signal to align the beam over successive reflections by the facets. A mechanism determines a delay by which each second delay mechanism is to delay the second clock signal, based on the beam-detect signal as differently delayed by the first delay mechanisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.