Optical disc apparatus and optical disc determining method

Details Optical disc apparatus and optical disc determining method Optical disc apparatus and optical disc determining method

2007-02-06

2010-12-14

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044250, C369S044260, C369S053230, C369S053280, C369S053370, C369S094000

Reexamination Certificate

active

07852715

ABSTRACT:
An objective lens is moved with a disc irradiated with laser light. A maximum value FEmax and a minimum value FEmin of the focus error signal, and a maximum value FSmax of the amplitude of a focus sum signal are measured. “(FEmax−FEmin)/FSmax” is compared with a determination value to determine the type of a disc.

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