AF control apparatus

Details AF control apparatus AF control apparatus

2006-10-10

2006-10-10

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S696000, C396S081000

Reexamination Certificate

active

07119968

ABSTRACT:
An AF control apparatus includes a plurality of movable lens groups, each of which is movable along an optical axis for performing focusing independently, and a driving system for moving each of the movable lens groups. A moving path of each of the movable lens groups during an autofocusing operation is defined so that a ratio of moving distances of the each of the movable lens groups is constant over an entire zoom range.

REFERENCES:
patent: 4217043 (1980-08-01), Momose et al.
patent: 5485236 (1996-01-01), Arai et al.
patent: 5850312 (1998-12-01), Kato et al.
patent: 6311019 (2001-10-01), Ide
patent: 2005/0254143 (2005-11-01), Saito et al.
patent: 7-120678 (1995-05-01), None
patent: 2548307 (1996-08-01), None
English Languange Abstract of JP 7-120678.

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