Optical disc apparatus and optical disc reproducing method

Details Optical disc apparatus and optical disc reproducing method Optical disc apparatus and optical disc reproducing method

2011-01-11

2011-01-11

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S053180, C369S053290, C369S053300

Reexamination Certificate

active

07869333

ABSTRACT:
The object of this invention is to provide an optical disc apparatus and an optical disc reproducing method that can realize an excellent reproducing operation by suppressing noise in the optical disc apparatus using an optical attenuator. In order to solve this object, a control voltage of the optical attenuator is changed according to reproduction power when reproducing the optical disc and an ambient temperature of the optical attenuator. In addition, the amplitude of a high frequency current for driving a laser diode is changed according to an attenuation factor of the optical attenuator.

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