Scanning optical apparatus
US5815301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Apr 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scanning optical apparatus for a printer and a digital copying machine has a light source, a deflector, first and second imaging units. The deflector deflects a light beam emitted from the light source to a main scanning direction. The first imaging unit makes the light beam emitted from the light source form an image in the vicinity of the deflection position of said deflector in the sub-scanning direction. The first imaging unit has a first resin lens having a negative refractive power only in a sub-scanning direction. The second imaging unit makes the light beam deflected by the deflector form an image on a scanned surface in the sub-scanning direction. The second imaging unit has a second resin lens having a positive refractive power only in the sub-scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.