Operation control apparatus of electric zoom camera
US5111226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1989 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Dec 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electric zoom camera comprises a photographing lens system having a zoom lens system, a detecting device for detecting a focal length of the photographing lens system and generating a corresponding output, a driving device for driving the photographing lens system for zooming, a commanding device for generating a command for executing zooming to the driving device, and control device for controlling the driving device in accordance with the output from the detecting device and the command, to change a focal length of the photographing lens stepwise between focal lengths of a plurality of predetermined focal lengths arranged substantially in accordance with a geometric progression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.