Autofocus apparatus
US6430368B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Aug 22, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/661
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The autofocus apparatus has a first mode of shifting a focus lens at a fine step interval so as to sample an AF evaluation value, and for detecting an in-focus position on the basis of a sampling AF evaluation value; and a second mode of shifting the focus lens at a coarse step interval so as to sample an AF evaluation value, and detecting a rough in-focus position on the basis of the sampling AF evaluation value, and subsequently, shifting the focus lens at a fine step interval so as to sample an AF evaluation value in the vicinity of the rough in-focus position, and detecting an in-focus position on the basis of the sampling AF evaluation value, and further, can select the first mode and the second mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.