Automatic focusing device

Details Automatic focusing device Automatic focusing device

1982-11-15

1984-11-13

Gellner, Michael L.

G03B 310

Patent

active

044822340

ABSTRACT:
An automatic focusing device includes a detecting device for detecting a state of an object image formed by an objective lens, a driving device for driving the lens in response to the detecting device, and a setting device for setting a moving range in which the lens is movable by the driving device. The moving range may be selected from mutually different plural ranges including a first range and a second range which have a mutually overlapping portion, or including a range containing a part of a normal moving range and a part of a macro-photographing moving range. Further, the moving range may be selected by setting an end position thereof beyond which the lens is prevented from moving.

REFERENCES:
patent: 4293206 (1981-10-01), Tokutomi et al.
patent: 4314748 (1982-02-01), Kawabata et al.

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