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

1995-12-26

1997-02-18

Epps, Georgia Y.

Optical: systems and elements

Lens

With support

359814, G02B 702

Patent

active

056046413

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 a system using a reproducing-only-disc, a write-once-disc or a erasable disc. The out-line of a construction is that each of support for an objective lens holder is composed of plural elastic wires surrounded damping material (silicone, for example), and a damping effect can be achieved by shearing stress caused in damping material, and each of support springs passes through a hole of a damping box, wherein the clearance between the support spring and the inner wall of the hole 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
patent: 4669823 (1987-06-01), Iguma
patent: 4927235 (1990-05-01), Narumi
patent: 5046820 (1991-09-01), Saekusa
patent: 5056891 (1991-10-01), Masunaga
patent: 5323369 (1994-06-01), Kim
patent: 5513047 (1996-04-01), Matsui

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