Unit to remove crosstalk in multi-layered disk, optical...

Details Unit to remove crosstalk in multi-layered disk, optical... Unit to remove crosstalk in multi-layered disk, optical...

2011-04-12

2011-04-12

Lamb, Christopher R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S047170

Reexamination Certificate

active

07924682

ABSTRACT:
A unit to remove crosstalk in a multi-layered disk, an optical pickup including the unit, and an optical recording and/or reproducing apparatus including the optical pickup, of which the optical pickup includes: a light source; an optical path changer to change the path of light emitted from the light source; a unit to remove crosstalk; an objective lens to focus incident light on a disk; and a photodetector detecting light reflected by the disk such that the unit to remove crosstalk separates light reflected by a target recording layer of the disk from light reflected by adjacent recording layers so that the light reflected by the target recording layer and the light reflected by the adjacent recording layers do not overlap on the photodetector.

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Office Action issued in corresponding European Patent Application No. 07123641.8 dated Apr. 28, 2008.
European Search Report issued in European Patent Application No. 07123641.8 on Jun. 27, 2008.

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