Lens driving device of an auto-focus system

Details Lens driving device of an auto-focus system Lens driving device of an auto-focus system

1983-01-28

1986-05-13

Hix, L. T.

354409, G03B 310

Patent

active

045882789

ABSTRACT:
A device for driving to move a focusing lens of an auto-focus system depending upon the current focus condition for use in a camera and the like includes an focusing lens driving processing circuit interposed between an arithmetic processing circuit, which receives distance information to an object of interest, and an indicator/controller. The driving processing circuit allows to maintain the detected in-focus condition sufficiently long so that the lens is prevented from executing unnecessary reciprocating movement and stability in operation is insured even if the object is in slight motion, or the camera is being held by hands.

REFERENCES:
patent: 4126870 (1978-11-01), Kondo
patent: 4303321 (1981-12-01), Enomoto et al.
patent: 4307947 (1981-12-01), Jyoiyiki
patent: 4336987 (1982-06-01), Shenk
patent: 4352545 (1982-10-01), Uno et al.

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