Scan lens for imaging device
US7978419B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2009 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jan 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scan lens for an imaging device includes first, second, third, and fourth lens elements optically positioned in ascending numeric order between a scanning component and an imaging surface. The first lens element has an optical power in an in-scan direction of the imaging device and an optical power in a cross-scan direction of the imaging device, the optical power in the cross-scan direction being positive and greater than the optical power in the in-scan direction. The second lens element has a negative optical power in the in-scan and cross-scan directions. The third lens element has a positive optical power in the in-scan direction and cross-scan directions. The fourth lens element has an optical power in the in-scan direction and a positive optical power in the cross-scan direction, the optical power in the cross-scan direction being greater than the optical power in the in-scan direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.