Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2008-01-29
2008-01-29
Wellington, Andrea (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S053180
Reexamination Certificate
active
11256701
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 ts 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).
REFERENCES:
patent: 4432083 (1984-02-01), Hsieh et al.
patent: 4727531 (1988-02-01), Ito et al.
patent: 4752843 (1988-06-01), Kim
patent: 5101396 (1992-03-01), Takeuchi et al.
patent: 5105413 (1992-04-01), Bakx
patent: 5184343 (1993-02-01), Johann et al.
patent: 5214626 (1993-05-01), Satoh et al.
patent: 5436880 (1995-07-01), Eastman et al.
patent: 5440534 (1995-08-01), Eastman et al.
patent: 5495466 (1996-02-01), Dohmeier et al.
patent: 5563861 (1996-10-01), Kudo et al.
patent: 5568458 (1996-10-01), Tani et al.
patent: 5708639 (1998-01-01), Iwanaga
patent: 5737481 (1998-04-01), Gushima et al.
patent: 5771214 (1998-06-01), Saga
patent: RE36218 (1999-06-01), Maeda et al.
patent: 6181653 (2001-01-01), Wada et al.
patent: 6222815 (2001-04-01), Nagano
patent: 0 371 880 (1990-06-01), None
patent: 59-22238 (1984-02-01), None
patent: 8-221911 (1996-08-01), None
patent: 11-273077 (1999-10-01), None
patent: 2000 020957 (2000-01-01), None
patent: 2000 090448 (2000-03-01), None
patent: 2000 251288 (2000-09-01), None
Takagi Kazunori
Tsuchiya Satoshi
Battaglia Michael V
Lerner David Littenberg Krumholz & Mentlik LLP
Wellington Andrea
LandOfFree
Apparatus and method of optical disk recording while... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method of optical disk recording while..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method of optical disk recording while... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3940780