Patent
1984-10-24
1985-08-13
Adams, Russell E.
35428912, G03B 7085, G03B 1700
Patent
active
045346402
ABSTRACT:
An exposure control system for a photographic camera of the type provided with a shutter preselection automatic exposure range and a diaphragm preselection automatic exposure range, wherein various exposure control parameters are digitized and applied to a digital computer for providing either shutter interval or diaphragm aperture control signals. For exposure control in the shutter preselection automatic exposure range, there are provided a signal generator associated with the camera diaphragm mechanism, an analog-to-digital converter cooperative therewith for providing digital signals corresponding to ever varying aperture sizes as the diaphragm mechanism is operated from its fully open position, and a comparator connected between said computer and converter upon detection of coincidence of the signal from the computer with one of the signals from the converter to provide a diaphragm mechanism arresting signal. Further, the invention provides various types of non-contact device usuable as the diaphragm information generator.
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patent: 3605583 (1971-09-01), Ort et al.
patent: 3833913 (1974-09-01), Wick et al.
patent: 3987460 (1976-10-01), Ueda et al.
patent: 4034383 (1977-07-01), Mashimo et al.
patent: 4054887 (1977-10-01), Holle et al.
patent: 4075641 (1978-02-01), Uno et al.
Isobe Yasuo
Ito Fumio
Ito Tadashi
Nakamoto Soichi
Adams Russell E.
Canon Kabushiki Kaisha
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