Automatic focus controlling apparatus

Details Automatic focus controlling apparatus Automatic focus controlling apparatus

1991-05-24

1992-10-27

Adams, Russell E.

354402, 3541951, G03B 1336

Patent

active

051593769

ABSTRACT:
An automatic focus controlling apparatus for a camera can set a lens position in a focus detection impossible state on the basis of previously obtained information associated with a distance to an object. The apparatus comprises a memory means for storing a focus controlling signal, and lens drive controlling means for, when an inoperative signal is output, controlling to drive a photographing lens in accordance with lens position information, and for, when the focus controlling signal is output, controlling to drive the photographing lens to a focus controlling position in accordance with the focus controlling signal. When the focus controlling signal is detected, the photographing lens is driven to a focus controlling position in accordance with the detected information. When the inoperative signal is output, the photographing lens is driven in accordance with the focus controlling signal stored in the memory means.

REFERENCES:
patent: 4416523 (1983-11-01), Kawabata
patent: 4500188 (1985-02-01), Kitagishi et al.
patent: 4994841 (1991-02-01), Ishida et al.
patent: 5053800 (1991-10-01), Ishida et al.

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