Photography – With exposure objective focusing means – focusing aid – or... – Having auxiliary illumination
Patent
1998-09-30
2000-09-05
Adams, Russell
Photography
With exposure objective focusing means, focusing aid, or...
Having auxiliary illumination
396109, G03B 1300
Patent
active
061155543
ABSTRACT:
To provide a distance measuring device for a camera using divided photocells which is resistant to beam deficiency, the device includes one or more light emitting elements for emitting measuring light to an object to be photographed, a plurality of photocells for measuring light reflected by the object, an adding circuit for adding outputs of an arbitrary continuous plurality of photocells, an integrating circuit for integrating an output of the amplifying circuit, and a CPU for calculating a distance to the object based on an output from the integrating circuit. The CPU determines a combination of one of the light emitting elements and a first photocell group at which a result of the addition is maximized, sets a second photocell group comprising the first photocell group and a single one or a plurality of the photocells contiguous to the first photocell group from the determined light emitting element and the determined first photocell group, divides the second photocell group into a plurality of subgroups and measures the distance to the object based on outputs from the respective divided subgroups.
REFERENCES:
patent: 4288152 (1981-09-01), Matsuda
patent: 4322141 (1982-03-01), Tominaga et al.
patent: 4582424 (1986-04-01), Kawabata
patent: 5191384 (1993-03-01), Nakanishi et al.
patent: 5245398 (1993-09-01), Ludden
patent: 5500728 (1996-03-01), Nishimoto
patent: 5550628 (1996-08-01), Kawabata
patent: 5862418 (1999-01-01), Ito
patent: 5963309 (1999-10-01), Nakanishi et al.
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