Objective lens driving apparatus

Details Objective lens driving apparatus Objective lens driving apparatus

1996-12-31

1999-11-09

Font, Frank G.

Optical: systems and elements

Lens

With support

359824, 359823, 359813, G02B 702

Patent

active

059825642

ABSTRACT:
An objective lens holder that holds an objective lens that directs a laser beam onto a disk is formed of a permanent magnet. Yokes are arranged at the periphery of the objective lens holder, with a focus coil and tracking coil fixed to them. One end of a wire-shaped flexible body is connected to one side face of the objective lens holder, the objective lens holder being thereby suspended and supported. Since the objective lens holder has applied to it displacement components with five degrees of freedom, excluding the axial direction of the flexible body, tilting of the optical axis of the objective lens can be generated. Consequently, coma aberration of the objective lens is reduced and high density recording and reproducing can be achieved.

REFERENCES:
patent: 5541763 (1996-07-01), Suzuki et al.
patent: 5623372 (1997-04-01), Matsui
The Transactions of the Institute of Electronics, Information and Communication Engineers C-II vol. J77-C-II No. 9 pp. 408-409; T.Komori et al.; Sep. 1994 (Japan).

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