Focus operation for an optical disk device

Details Focus operation for an optical disk device Focus operation for an optical disk device

2008-01-15

2008-01-15

Patel, Gautam R. (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S047410, C369S044320

Reexamination Certificate

active

07319646

ABSTRACT:
A disk device in which at the recovery job of a focus pull-in operation, a CPU supplies servo control means with the respective correction values of the rotational speed of an optical disk and the moving speed of a lens which are described in the data table of a RAM, and performs the focus pull-in operation and determines whether or not the focus pull-in operation is successfully performed at the respective adjustment steps, and if the focus pull-in operation is successfully performed, the servo control means changes the amount of movement of the lens in response to a surface swing of the optical disk.

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