Optical scanning system using a laser diode array
US4932734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Dec 6, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning system using a laser diode array includes a collimator lens, a first imaging optical system being afocal in a deflection plane for imaging a plurality of beams from the collimator lens into respective lines in a plane perpendicular to the deflection plane, a deflector having a deflection/reflection surface, for deflecting beams from the first imaging optical system, and a second imaging optical system for focusing beams from the deflector on a scanned surface. The first imaging optical system includes, in the following order from the side of the collimator lens toward the deflector, a first spherical lens having a positive refracting power, a first cylindrical lens having a positive refracting power in the plane perpendicular to the deflection plane and a lens surface having a curvature opposite to the collimator lens, a second cylindrical lens having a negative refracting power in the plane perpendicular to the deflection plane and a lens surface having a curvature opposite to the collimator lens, and a second spherical lens having a positive refracting power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.