Optical scanning apparatus
US6288818A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning apparatus includes a plurality of light sources which emit first and second beams. First and second coupling lens units respectively couple the first and second beams emitted by the plurality of light sources. A rotary deflector which has pairs of mutually-opposite reflection surfaces and deflects the first beam in a first direction by one of the reflection surfaces and deflects the second beam in a second direction opposite to the first direction, by another of the reflection surfaces. First and second imaging units scan an image surface of a photoconductive medium along a first half of a main scanning line by focusing and deflecting the deflected first beam onto the image surface, and scan the image surface along a second half of the main scanning line by focusing and deflecting the deflected second beam onto the image surface, such that the first and second halves form a substantially straight scanning line on the image surface when the rotary deflector is rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.