Optical scanning apparatus and image forming apparatus
US7218432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2006 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Jun 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light source which is a surface emitting laser including a plurality of apertures that correspond to light emitting regions arranged in a two-dimensional array and limit the regions, and a scanning optical system satisfies conditions of Dm·|βm|<ωm and Ds·|βs|<ωs, where Dm is a width of each of the apertures in a main scanning direction, Ds is a width of the each aperture in a sub-scanning direction, βm is a magnification of both of a coupling optical system and the scanning optical system in the main scanning direction, βs is a magnification of both of the coupling optical system and the scanning optical system in the sub-scanning direction, ωm is a size of an optical spot in the main scanning direction formed on a scan target surface, and ωs is the size of the optical spot in the sub-scanning direction formed on the scan target surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.