Exposure control device for camera
US4131350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1977 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Oct 6, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/09974
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an exposure control device for a camera for obtaining a proper exposure taking the differences of the films to be used into consideration, so designed that an exposure amount control circuit for controlling an exposure amount by means of a first light measuring circuit for measuring the light reflected from the film plane is provided, while a second light measuring circuit for measuring the light reflected from the shutter plane and/or the film plane is provided in such a manner that by means of the output of the second light measuring circuit the control output value of the exposure amount control circuit is compensated so as to obtain a proper exposure amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.