Method and apparatus for providing focus control on a multi...

Details Method and apparatus for providing focus control on a multi... Method and apparatus for providing focus control on a multi...

2006-05-30

2006-05-30

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S094000, C369S053220, C369S044260

Reexamination Certificate

active

07054240

ABSTRACT:
The present invention is a method and system to provide focus control in a multi-layer optical storage medium. The method comprises generating a beam of light and reflecting the beam of light off one of a first and a second optical layers on a disk. The reflected beam is detected and a servo signal is provided in response to the reflected beam. The light source is directed to move from a first position to a second position based on the servo signal, so as to focus the light source from one of the first or the second optical layer to another one of the first or the second optical layer.

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