Optical scanning system having a surface inclination correction function
US4836630A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Oct 22, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning surface includes a light source, a first imaging forming optical system for forming a line image from a light flux emitted from the light source, a rotating polyogon mirror for deflecting the light from the light source through the first image forming optical system over a predetermined angle, a second image forming optical system for receiving the thus deflected light flux and then forming an image on a scanning surface. The second image forming optical system includes a first single spherical meniscus lens having a negative refracting power, a second single spherical meniscus lens having a positive refracting power, and a third single lens having a cylindrical surface facing the second lens and a toric surface at its opposite side, as arranged in the order mentioned between the polygon mirror and the scanning surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.