Dynamic correction of field curvature from a scanner
US7460146B2 · kind B2 · utility
1Cited by
9References
14Claims
0Family size
Inventor
Key dates
| Filing date | Oct 28, 2004 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Oct 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Systems and methods are described that dynamically correct field curvature and other focus errors in imaging systems that use rotating scanners to scan an image field. The dynamic correction controls the focusing of an image field such that focus is maintained across the width of a photosensitive element as a rotating scanner scans the field. The described systems and methods enable the use of post-objective scanning configurations in which the complexity and expense of objective lenses is significantly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.