Focusing device for automatic focusing camera

Details Focusing device for automatic focusing camera Focusing device for automatic focusing camera

1979-03-06

1981-03-31

Hix, L. T.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250201, G03B 708, G01J 120

Patent

active

042589886

ABSTRACT:
An automatic lens focusing mechanism including a displaceable operating member, a focusing mechanism cooperative with the operating member for changing the focus of a lens as the operating member is displaced, and a mechanism comprising a control member displaced by the operating member as the operating member is displaced. An electromagnet is effective to hold an armature when it is energized. When the electromagnet is not energized the armature is mounted for sliding across a face of the electromagnet adjacent and parallel to the electromagnet face. A focus detecting mechanism energizes the electromagnet when the control member is at a position corresponding to a focused condition of the lens for holding the armature and the control member at a position corresponding to the focused condition to thereby hold the lens at the focused condition.

REFERENCES:
patent: 3618499 (1971-11-01), Harvey
patent: 4075639 (1978-02-01), Peterson

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