Optical disc apparatus and optical disc discriminating method

Details Optical disc apparatus and optical disc discriminating method Optical disc apparatus and optical disc discriminating method

2008-12-18

2011-10-18

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S094000

Reexamination Certificate

active

08040775

ABSTRACT:
An optical disc apparatus capable of discriminating swiftly and accurately a dual disc from other discs and an optical disc discriminating method, wherein the optical disc apparatus irradiates laser beams having a different wavelength onto the optical disc, detects the reflected light obtained by the irradiation of the laser beams having the individual wavelengths, determines amplitude of an error signal according to the detected results of the individual reflected lights, and discriminates the optical disc based on a ratio of amplitudes of the individual reflected lights.

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