Camera with exchangeable lens device
US5003399A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Nov 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video camera has a body with an imager therein for providing a video signal in response to the projection of a light image thereon by a selected exchangeable lens device removably mounted on the camera body, and first and second computers in the camera body and lens device, respectively, which are programmed so that, in an initial communication sequence therebetween after the selected lens device is mounted on the camera body, the second microcomputer transmits optical characteristic data for the respective lens device to the first microcomputer in response to a data transmission request signal from the latter, and further so that, in a control communication sequence which follows the initial communication sequence, the first microcomputer transmits a control signal to the second microcomputer on the basis of the received optical characteristic data and a controlled status signal supplied to the first microcomputer from the second microcomputer. Further, upon the mounting of the selected lens device on the camera body, the existence of adequate electrical connections therebetween is readily detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.