Optical pick-up system for use in an optical disk device...

Details Optical pick-up system for use in an optical disk device... Optical pick-up system for use in an optical disk device...

2007-07-31

2007-07-31

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S109010, C369S044120

Reexamination Certificate

active

10858415

ABSTRACT:
The present invention is an optical pick-up system for use in an optical disk device including more efficient beam diffraction for tracking purposes. The system may be used for one or more types of optical disks (e.g., DVDs, CDs, CD-ROMs). The invention includes a system for use in a DVD player; however, the present invention is applicable to any optical disk device. The system invention includes a gray-scale grating, which provides more efficient diffraction of tracking and processing portions of the laser(s) used in optical disk devices.

REFERENCES:
patent: 6167016 (2000-12-01), Block et al.
patent: 6360012 (2002-03-01), Kreuzer
patent: 6496465 (2002-12-01), Broome et al.
patent: 6549504 (2003-04-01), Liu et al.
patent: 2002/0118611 (2002-08-01), Kim et al.
patent: 2003/0007436 (2003-01-01), Komma et al.
patent: 2005/0053844 (2005-03-01), Wu
patent: 2005/0135744 (2005-06-01), Greiner et al.

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