Focus detection device and automatic focusing device for camera

Details Focus detection device and automatic focusing device for camera Focus detection device and automatic focusing device for camera

1984-06-12

1985-12-31

Perkey, William B.

354403, G03B 300

Patent

active

045617465

ABSTRACT:
The disclosure is directed to a focus detection device which is provided with first to third reference signal generators for generating reference signals which are compared with a focus condition signal varying with the amount and direction of the adjustment required for the objective lens to focus on a target object, and also, to an automatic focusing device for a camera, which is equipped with an objective lens operating system for the focusing, and a motor for controlling the objective lens operating system in response to a signal from a focus condition determining means.

REFERENCES:
patent: 4305657 (1981-12-01), Masunaga et al.
patent: 4432620 (1984-02-01), Kurokawa
patent: 4470683 (1984-09-01), Nakajima

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