Automatic focusing device for video camera
US4558367A · kind A · utility
15Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/67
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic focusing device for video camera in which the distance between a lens mounting section of a camera body and the imaging plane of an imaging unit is varied for focusing by moving at least either a lens mounting section or the imaging plane along the optical axis. The device comprises focus detector for receiving the data about an object through a light splitter and driving circuit for varying the distance between lens mounting section and imaging plane according to the output of the focus detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.