Automatic focusing apparatus for zoom lens

Details Automatic focusing apparatus for zoom lens Automatic focusing apparatus for zoom lens

1984-05-17

1986-09-02

Corbin, John K.

350255, G02B 710, G02B 1518

Patent

active

046092609

ABSTRACT:
The disclosed zoom lens apparatus operates in a manual focusing mode and an automatic focusing mode with a manual focusing movement imparted to one lens component and an automatic focusing movement imparted to another lens component. In the automatic focusing mode, the manual focusing lens component is held stationary at a prescribed constant position and the automatic focusing lens component operates within limits which vary with zooming. In the manual focusing mode, the automatic focusing lens component rests at one of the limits of the zooming and focusing ranges.

REFERENCES:
patent: 3972056 (1976-07-01), Tsujimoto et al.
patent: 4043642 (1977-08-01), Hirose et al.
patent: 4145732 (1979-03-01), Pandres, Jr.
patent: 4161756 (1979-06-01), Thomas
patent: 4439018 (1984-03-01), Okajima et al.
patent: 4457591 (1984-07-01), Muryoi et al.

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