Optical scanning system
US5005928A · kind A · utility
45Cited by
3References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jul 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning system includes a light source, a coupling lens, a polygon mirror, an f.theta. lens, and a barrel toroidal lens. The barrel toroidal lens includes a barrel toroidal surface in which the radius of curvature thereof measured in the sub-scanning direction decreases with an increased distance from the optical axis of the barrel toroidal lens in a direction parallel to the main scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.