Optical pickup

Dynamic optical information storage or retrieval – Particular cabinet structure for optical media – Environmental control

Reexamination Certificate

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Reexamination Certificate

active

07146621

ABSTRACT:
An inventive optical pickup includes: a base; a movable part; a fixed part; and a first yoke. The movable part, fixed part and first yoke are provided over the base. The movable part is provided with: a hologram element; a package equipped with a laser/photodetectors integrated element in which a semiconductor laser and photodetectors are integrated; and an objective lens. A magnet is provided on each of second yokes provided on the base, and a heat dissipating medium is provided in a gap between a package metal section of the package and another magnet.

REFERENCES:
patent: 4721850 (1988-01-01), Sakai et al.
patent: 6534794 (2003-03-01), Nakanishi et al.
patent: 2004/0223423 (2004-11-01), Tsuda
patent: 55-150586 (1980-11-01), None
patent: 61-272954 (1986-03-01), None
patent: 11-339291 (1999-12-01), None
patent: 2000-57602 (2000-02-01), None
patent: 2001-344783 (2001-12-01), None
patent: 2001-344783 (2001-12-01), None

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