Light scanning system
US5130840A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Nov 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light scanning system has a light source, a deflecting device, an anamorphic scanning lens having different refracting powers in a principal scanning plane and in a secondary scanning plane perpendicular to the principal scanning plane, and another anamorphic convex lens, such as a cylindrical lens, having a larger refracting power in the secondary scanning plane than in the principal scanning plane. The anamorphic convex lens is rotatable for adjustment about an axis of rotation that is substantially parallel with the optical axis of the optical system. When a tapered polygon mirror is used as the deflecting device, the anamorphic convex lens is mounted in a tilted manner such that two principal meridians projected via the reflecting surface of the deflecting device substantially coincide with respective scanning planes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.