Automatic exposure device and photometry device in a camera

Details Automatic exposure device and photometry device in a camera Automatic exposure device and photometry device in a camera

1996-08-26

1997-09-02

Adams, Russell E.

Photography

Exposure control circuit

Having plural photocells

396268, 396273, G03B 708

Patent

active

056642423

ABSTRACT:
An automatic exposure device in a camera divides an object field into a plurality of areas and photometers them by the use of a divisional photometry element, and calculates optimum exposure from the result of the photometry. The divisional photometry element includes a photometric converting portion for photoelectrically converting incident light in each of the areas and putting out an output, and a reading portion for reading out the plurality of outputs of the photoelectric converting portion. When the number of successive outputs of a row of the areas in the readout direction which exceed a predetermined value is greater than a predetermined number, the output of that row is completely omitted in the calculation of the optimum exposure.

REFERENCES:
patent: 3179808 (1965-04-01), Grey et al.
patent: 3904818 (1975-09-01), Kovac
patent: 4476383 (1984-10-01), Fukuhara et al.
patent: 4567525 (1986-01-01), Endo et al.
patent: 4703442 (1987-10-01), Levine
patent: 4705382 (1987-11-01), Mukai et al.
patent: 4739495 (1988-04-01), Levine
patent: 4870443 (1989-09-01), Hayakawa et al.

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