Optical scanning lens, optical scanning device and image forming apparatus
US6744545B2 · kind B2 · utility
19Cited by
43References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jul 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|&Dgr;n(x)−min[&Dgr;n(x)]|<34×10−5, where &Dgr;n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[&Dgr;n(x)] denotes the minimum value of the &Dgr;n(x).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.