Optical disk recording apparatus and optical disk recording...

Details Optical disk recording apparatus and optical disk recording... Optical disk recording apparatus and optical disk recording...

2006-05-02

2006-05-02

Miller, Brian E. (Department: 2652)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053180

Reexamination Certificate

active

07038980

ABSTRACT:
According to the present invention, it is intended that the recording can be executed normally even against small vibrations to which a servo error signal detecting circuit cannot respond. A recording apparatus according to the present invention includes an optical head (12) for receiving a reflected laser beam (LREF) obtained when a laser beam (LIRR) is irradiated on a CD-R (10). This recording apparatus further includes a gate circuit (31) to which an output signal (SRD) of the optical head (12) is supplied and a level comparing circuit (34) for comparing a value of an output signal (DTAU) of this gate circuit (31) with a predetermined reference value (DTH). Upon recording, the gate circuit (31) is controlled in such a manner that a signal of a predetermined period τ may be outputted from the output signal (SRD) supplied from the optical head (12) to the gate circuit (31) as the output signal (DTAU). An output signal (SCMP) of the level comparing circuit (34) is outputted as a detected result of vibrations of the CD-R (10) or vibrations of the optical head (12).

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