Camera with automatic focus and exposure control means
US4792820A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1986 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Sep 11, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera with an AF and AE control structure including a one-shot AF mode and a continuous AF mode, in which the operability and exposure control are improved. The camera includes a unit for detecting a focusing condition of an objective lens, defined by the relationship between a position of an object to be photographed against the lens and a focus point of the lens; a unit for focusing the lens in accordance with the detected focusing condition so that the lens is moved to the in-focus position, a first light measurement unit for measuring light at a spot area corresponding to a region of the object to be detected at the detecting unit, a second light measurement means for measuring averaged light at another area broader than the first area, and a unit for controlling exposure amount. The exposure control unit determines the exposure amount on the basis of the spot metering data in a one-shot AF mode, or the averaged light measuring data which is defined as a data at a time, at least, when the lens is adjacent to the in-focus position, in a continuous AF mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.