Scanning unit and image forming apparatus
US7545547B2 · kind B2 · utility
24Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2007 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Dec 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scanning optical system leads the light fluxes deflected by the polygon mirror to a photosensitive drum. An absolute value of a lateral magnification in a main scanning direction is larger than an absolute value of a lateral magnification in a sub-scanning direction. Moreover, a beam diameter in the sub-scanning direction on a surface of the photosensitive drum is equal to or smaller than a beam diameter in the main scanning direction and larger than a scan line interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.