Optical pickup device and method of laying out the same

Details Optical pickup device and method of laying out the same Optical pickup device and method of laying out the same

2011-03-08

2011-03-08

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112010

Reexamination Certificate

active

07903507

ABSTRACT:
An optical pickup device is provided, in which, supposing that an angle formed by the meeting of a straight line connecting a center of an optical disk and an accessing position of an HD objective lens with a diameter L of the optical disk is a track angle θ1, an oscillation angle α of an optical system including an HD laser, an HD half mirror, and an HD sensor, and a distance z of the HD objective lens are set so as to satisfy α−(θ1max+θ1min)/2=±45°, where θ1max is the track angle θ1when the HD objective lens is positioned at an innermost circumference of the optical disk, and θ1min is the track angle θ1when the HD objective lens is positioned at an outermost circumference of the optical disk.

REFERENCES:
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Japanese Office Action, with English translation, issued in Japanese Patent Application No. 2005-376247, mailed Apr. 14, 2009.
Japanese Office Action, with English translation, issued in Japanese Patent Application No. 2005-377003, mailed Apr. 14, 2009.
Chinese Office Action, with English translation, issued in Chinese Patent Application No. CN 200610172364.3, mailed Feb. 15, 2008.

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