Camera provided with automatic focus detector

Details Camera provided with automatic focus detector Camera provided with automatic focus detector

1980-10-21

1982-06-22

Adams, Russell E.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

354 44, 354195, 354198, 250201, G03B 708

Patent

active

043359426

ABSTRACT:
A camera provided with automatic focus detector is disclosed. The automatic focus detector drives a photographing lens toward the in-focus position by lens driving means in accordance with focus detection signal repeatedly put out from focus detecting means. The present invention is directed to improvement in focusing operation of such camera. Said lens driving means is allowed to drive the photographing lens toward the in-focus position only when the focus detection information signal continues to be constant longer than a predetermined time length. At the same time, the driving state of the photographing lens by said lens driving means is detected and display means is controlled by the detection signal to display the state of focusing now present.

REFERENCES:
patent: 3611894 (1971-10-01), Minneste
patent: 3906389 (1975-09-01), Matsomoto et al.
patent: 3972607 (1976-08-01), Reider
patent: 4240726 (1980-12-01), Wick

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