Multi-beam scanning optical system and image forming apparatus using the same
US6914620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2002 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Sep 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/123
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
It is an object of the present invention to provide a multi-beam scanning optical system, which can reduce relative deviation of a writing position of each light-emitting portion due to focus deviation of a synchronization detection optical device, and an image forming apparatus using the same. In the multi-beam scanning optical system having the synchronization detection optical device including a light source device, an incident optical device, a deflection device, a scanning optical device and a slit, each element is set such that relative deviation of a writing position of each light beam due to deviation of a focus position within a main scanning cross section is reduced by a first light beam limiting element provided between the deflection device and the slit and a conditional expression is satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.