Scanning optical system for use in a laser beam printer
US4756583A · kind A · utility
24Cited by
17References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1987 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Feb 6, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system particularly for a laser beam printer comprising a semiconductor laser, a collimating lens, a cylindrical lens having curvature in the sub-scanning cross section, a deflector and anamorphic scanning lens system concentrating the light on a scanning plane. The anamorphic scanning lens system may have one to four lenses but has one lens with a convex toric surface facing the scanning plane. The anamorphic scanning lens system has stronger power in the sub-scanning cross section than in the main scanning cross section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.