Single-lens extended depth-of-field imaging systems
US8488044B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2009 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/19
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An extended depth of field (EDOF) imaging system that has a corresponding extended depth of focus (EDOF′). The imaging system has an optical system consisting of a single lens element and an objectwise aperture stop arrange substantially at a zero-coma axial position. The single lens element is configured so that the optical system has a select amount of spherical aberration (SA) in the range 0.2λ≦SA≦2λ, where λ is an imaging wavelength. The single lens element generates an amount of axial chromatic aberration that increases the EDOF while decreasing the average MTF of the optical system relative to the optical system having no chromatic aberration. The imaging system has an image sensor for forming a digitized raw image of an object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.