Automatic flash amount control apparatus of camera

Details Automatic flash amount control apparatus of camera Automatic flash amount control apparatus of camera

1995-03-28

1996-11-19

Adams, Russell E.

Photography

With object illumination for exposure

Having artificial illumination termination control

396157, 396166, 396234, G03B 1505

Patent

active

055767982

ABSTRACT:
An automatic flash amount control apparatus of camera, which can avoid over-exposure of a subject to be controlled in flash amount even if the subject to be illuminated occupies only a small portion of photo-taking screen, executes photo-metering of a field to be photographed while dividing the field into a plurality of first metering regions without flashing of a flashing device and meters an optical flux emitted by the flashing device and then reflected by the field to be photographed while dividing the flux into a plurality of second metering regions. The apparatus separates the second metering regions into two groups, one of which is to contribute to and the other of which is not to contribute to flash amount control, with correspondence to respective results of metering of the first metering regions. Upon flashing of the flashing device, an amount of flash of the flashing device is controlled according to results of metering of the second metering regions which have been determined to contribute to the flash amount control.

REFERENCES:
patent: 4429969 (1984-02-01), Saegusa
patent: 4441797 (1984-04-01), Maruyama et al.
patent: 4542975 (1985-09-01), Ishida et al.
patent: 4705382 (1987-11-01), Mukai et al.
patent: 4782357 (1988-11-01), Hayakawa et al.
patent: 4809030 (1989-02-01), Takagi et al.
patent: 4965620 (1990-10-01), Takagi et al.
patent: 5006879 (1991-04-01), Takagi et al.
patent: 5164759 (1992-11-01), Yasukawa
patent: 5168300 (1992-12-01), Yasukawa
patent: 5172157 (1992-12-01), Takagi
patent: 5218397 (1993-06-01), Takagi
patent: 5243376 (1993-09-01), Yokonuma

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