Camera, device for capturing object image, automatic focus adjusting system and method for adjusting automatic focus for the same
US6885819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | May 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
System controller (10) seeks a focus adjusting evaluating value which is indicative of focus adjusting state as a criterion from object image information, and searches a focus adjusted position where focus adjusting evaluating value becomes the most appropriate and drives the focus operating means to the focus adjusted position to perform a focus adjusting by a focus adjusting scan to obtain a plurality of focus adjusting evaluating value by operating the focus adjusting evaluating value detecting means while driving focusing lens (1a) in at lease one way of continuous way or intermittent way which varies focus adjusting state of the object image.System controller (10) shifts a scan starting point from an initial locating position Po of the focusing lens (1a) in a first predetermined amount of distance in a predetermined direction then initiate scan from the initial locating position toward an opposite direction to the predetermined direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.