Objective lens actuator and method for manufacturing the same

Details Objective lens actuator and method for manufacturing the same Objective lens actuator and method for manufacturing the same

1996-12-06

1998-03-31

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specified detail of transducer assembly support structure

369247, 369 4415, 359814, G11B 709

Patent

active

057346380

ABSTRACT:
It is the object of the invention to decrease the gain peak of an objective lens holder at a natural frequency of a biaxial objective lens actuator used in an optical disc system using a reproducing-only-disc, a write-once-disc or an erasable disc. The out-line of a construction is such that each support for the objective lens holder is composed of plural elastic wires surrounded by damping material (silicone, for example), and a damping effect can be achieved by shearing stress caused in the damping material, and each of the support springs passes through a hole of a damping box, wherein the clearance between the support spring and the inner wall of the hole of the damping box is filled with gelled damping material. A further improvement of damping can be achieved by the damping box.

REFERENCES:
patent: 4646283 (1987-02-01), Ito et al.
patent: 4927235 (1990-05-01), Narumi
patent: 5323369 (1994-06-01), Kim

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