Optical scanner for image recording apparatus
US5161047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1991 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | May 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanner having a deflecting device for reflecting and deflecting a laser beam issued from a light source device with a reflective surface thereof, and image forming optics for focusing the deflected laser beam onto a target surface to form a beam spot. A first aperture is interposed between the light source device and the deflecting device for correcting the diameter of the beam spot to be formed on the target surface. A second aperture is located on an optical axis between the first aperture and the target surface for intercepting, at least in a direction corresponding to subscanning, part of the light diffracted by the first aperture which lies outwardly of the first minimums.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.