Scanning optical system, optical scanning device and image forming apparatus
US7215354B1 · kind B1 · utility
24Cited by
40References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2000 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Nov 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scanning optical system condensing a beam deflected by an optical deflector so as to form a beam spot on a surface to be scanned, comprises two lenses. A lens on the side of optical deflector has a negative refracting power in sub-scanning direction. A lens on the side of surface to be scanned has a positive refracting power in the sub-scanning direction. At least one lens surface of the lens surfaces of the two lenses is such that a shape in a sub-scanning section thereof is a non-arc shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.