Scanning optical apparatus
US7492496B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2006 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Mar 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scanning optical apparatus capable of maintaining sub scanning magnification small, and further, keeping the apparatus size small without elongating lenses, also suppresses spherical aberration relative to a scanning surface of a beam light small, thereby illuminating the beam light of high quality on the scanning surface. A beam light from a scanner is magnified by a scanning lens (magnifying lens), allowing sub scanning magnification be minimized. Also, while spherical aberration is normally aggravated since the beam light is magnified by the scanning lens, spherical aberration is suppressed by forming a correcting lens downstream from the scanning lens in a surface-decentered shape with respect to a light axis of the beam light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.