Automatic focusing device

Details Automatic focusing device Automatic focusing device

1982-09-13

1984-10-02

Gellner, Michael L.

G03B 310

Patent

active

044744498

ABSTRACT:
An automatic focusing device is capable of providing stable operation in a range close to the in-focus position, without degrading resopnse outside the range. In the focusing device, a photographic lens is driven, outside a range close to the in-focus position, according to a focusing signal, but, within said range, according to a control signal so modified as not to reflect very fast changes in the focusing signal.

REFERENCES:
patent: 4331864 (1982-05-01), Nakajima et al.
patent: 4333007 (1982-06-01), Langlais et al.
patent: 4408288 (1983-10-01), Kondo et al.

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