Imaging system with enlarged depth of field
US4404594A · kind A · utility
29Cited by
0References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Nov 2, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging system with an enlarged depth of field for use with a means for focusing an image, including: means for sensing an image sample from each of a plurality of portions of the image at each of a plurality of optical distances from the means for focusing; means for determining the relative focus of the image samples derived from a portion of the image at each of the plurality of distances; and means responsive to the means for determining for choosing, for each of the plurality of portions of the image, the image sample having a desired focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.