Inner focus type zoom lens driving mechanism

Details Inner focus type zoom lens driving mechanism Inner focus type zoom lens driving mechanism

1995-08-16

1997-03-18

Garber, Wendy

Television

Camera, system and detail

Optics

348349, 348357, H04N 5232

Patent

active

056127405

ABSTRACT:
A lens driving device comprising a permanent magnet fixed on one side of the lens barrel, the N and S poles of the magnet being arranged in the direction of the optical axis of the lens, a cylindrical moving coil concentric with and covering the cylindrical permanent magnet, a lens unit which is driven by the cylindrical moving coil under a focus control circuit from an image signal, and a position sensor that detects the lens position and provides feed back to the focus control circuit.

REFERENCES:
patent: 4598989 (1986-07-01), Yamada et al.
patent: 4749269 (1988-06-01), Nakashima et al.
patent: 5325146 (1994-06-01), Toji

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