Stabilized optical pick-up unit for use in a disk player

Details Stabilized optical pick-up unit for use in a disk player Stabilized optical pick-up unit for use in a disk player

1992-03-19

1993-09-07

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4415, 369 4416, 369 4421, G11B 700

Patent

active

052435849

ABSTRACT:
An optical pick-up unit for an optical disk drive comprising a base plate secured to an optical block with an opening to enable a laser beam emitted by a laser emitter of the optical block to pass therethrough is disclosed. A support member is secured to the base plate opposite the opening and with a spring operatively secured thereto. A tracking damper is secured to the support member. A tracking support member is secured to the tracking damper and further includes a center of gravity with an insert hole formed therein. A support element extends through the insert hole and has a recess formed into each end of the support element. A pin is secured to the spring and another pin is secured to the base plate such that the pins are aligned with the insert hole and contact the support element, respectively. An objective lens is positioned over the opening and is secured to the tracking support member. A balance weight is positioned on the tracking support member opposite the objective lens for maintaining the center of gravity of the tracking support member at the insert hole upon securing the objective lens to the tracking support member such that the tracking damper and the support element act on the tracking support member to enable the objective lens to be stabilized in a focusing direction and in a tracking direction.

REFERENCES:
patent: 4669073 (1987-05-01), Wakabayashi et al.
patent: 4818066 (1989-04-01), Nose
patent: 4823336 (1989-04-01), Inada et al.
patent: 4838649 (1989-06-01), Ichikawa et al.
patent: 4912693 (1990-03-01), Goda

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