Focusing method of layer jumping for an optical storage device

Details Focusing method of layer jumping for an optical storage device Focusing method of layer jumping for an optical storage device

2006-07-18

2006-07-18

Miller, Brian E. (Department: 2652)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044290

Reexamination Certificate

active

07079464

ABSTRACT:
A focusing method of layer jump for an optical storage device to retrieve data from a multi-layer optical disc is disclosed. The optical disc includes first data layer and second data layer. Before layer jump, the focus is on the first data layer, and the second data layer is the target data layer to proceed with layer jump. If layer-jump failure, no matter where the focus is, an auxiliary force is provided to let the lens continuously move along the layer jump direction and prevent the focus from locating between the two data layers. And then, the lens moves along a backward direction to set on the second data layer according to a reference signal.

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