Multipoint autofocus system and camera having multipoint...

Photography – With exposure objective focusing means – focusing aid – or... – Plural focusing or rangefinding areas

Reexamination Certificate

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Details

C348S349000

Reexamination Certificate

active

07496290

ABSTRACT:
A multipoint autofocus system in which a pair of object images, obtained by pupil-division of an object light bundle in each detection area, are projected onto different zones of a sensor and are converted into image signals, so that a defocus amount can be determined based on the image signals, the multipoint autofocus system including intersecting detection areas whose detection areas partly overlap and a plurality of sensor arrays of the sensor corresponding to respective the intersecting detection areas; and a selection device for selecting a defocus amount whose absolute value is smallest out of defocus amounts obtained by each sensor array of the intersecting detection areas.

REFERENCES:
patent: 5041859 (1991-08-01), Ishiguro et al.
patent: 6115553 (2000-09-01), Iwamoto
patent: 6859619 (2005-02-01), Kurosawa
patent: 2002-072069 (2002-03-01), None
patent: 2002-131621 (2002-05-01), None
patent: 2002-323650 (2002-11-01), None
English Language Abstract of JP 2002-323650.
English Language Abstract of JP 2002-072069.
English Language Abstract of JP 2002-131621.

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