Automatic focus control device
US4783677A · kind A · utility
48Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Jun 22, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic focus control device for use in a camera in which a defocus condition of the lens of the camera is detected by estimating the defocus value by detecting the motion of the photographic object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.