Range synchronized flash photographic apparatus and method for a

Details Range synchronized flash photographic apparatus and method for a Range synchronized flash photographic apparatus and method for a

1981-06-01

1982-09-21

Gellner, Michael L.

354 29, 354 30, 354 33, 354 34, 354 60F, 354137, 354139, G03B 710, G03B 1505

Patent

active

RE0310344

ABSTRACT:
An image recording apparatus and method employing a diaphragm shutter having a time variable exposure aperture with flash firing, following actuation of the shutter, after a time interval dependent on subject range. The functional relationship between the time interval and subject range establishes a parametric relationship between the brightness of the subject due to its flash illumination and the scan time of the diaphragm shutter. The inverse of this parametric relationship constitutes the timewise variation in the exposure aperture area of the shutter. Consequently, whenever the subject is within a predetermined maximum distance from the camera, dependent upon the maximum aperture area attainable by the shutter, the instantaneous product of subject brightness and aperture area will be a constant with the result that proper exposure of the photographic film is achieved independent of the subject range.

REFERENCES:
patent: 3478660 (1969-11-01), Land
patent: 3570381 (1971-03-01), Sateo et al.
patent: 3683769 (1972-08-01), Uchiyama et al.
patent: 3690237 (1972-09-01), Fuwa
patent: 3762299 (1973-10-01), Douglas
patent: 3794422 (1974-02-01), Chitayat
patent: 3972058 (1976-07-01), Johnson et al.
patent: 3994007 (1976-11-01), Uchiyama et al.
patent: 4020497 (1977-04-01), Ueda
patent: 4047190 (1977-09-01), Johnson et al.
patent: 4047191 (1977-09-01), Coppa et al.

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