Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2008-04-22
2011-12-13
Haley, Joseph (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S112160, C369S112150, C369S112170, C369S112180, C369S112190, C369S112100, C369S112020, C369S103000
Reexamination Certificate
active
08077563
ABSTRACT:
In a beam applying method, recording and reproducing operations are performed on an optical recording medium, in which a signal is recorded and reproduced by applying a beam thereto and which has a recording layer on which the signal is recorded, a quarter-wavelength plate formed below the recording layer, a polarizing plate formed further below the quarter-wavelength plate, and a reflecting film formed below the quarter-wavelength plate. The beam applying method includes the steps of; emitting a beam to be applied to the optical recording medium; and driving a quarter-wavelength plate inserted into an optical system serving to guide the emitted beam to the optical recording medium so that the optical axis direction thereof has a predetermined angle difference at the time of performing a recording operation and reproduction.
REFERENCES:
patent: 5301182 (1994-04-01), Komma et al.
patent: 7170661 (2007-01-01), Ogasawara et al.
patent: 2004/0165518 (2004-08-01), Horimai et al.
patent: 2007/0047037 (2007-03-01), Yoshizawa et al.
patent: 2008/0285395 (2008-11-01), Tanaka et al.
patent: 2009/0059763 (2009-03-01), Kamada et al.
patent: 2009/0290471 (2009-11-01), Tanaka et al.
patent: 2009/0323496 (2009-12-01), Tanaka et al.
patent: 2003-039001 (2003-02-01), None
patent: 2004-265472 (2004-09-01), None
patent: 2005-292766 (2005-10-01), None
patent: 2006-163021 (2006-06-01), None
patent: 2007-102185 (2007-04-01), None
patent: 2005-109117 (2005-11-01), None
Toishi et al., “Experimental analysis in recording transmission and reflection holograms at the same time and location,” Applied Optics, vol. 45, pp. 6367-6373, 2006.
Japanese Office Action dated Apr. 14, 2009, for corresponding JP Patent Application 2007-129194.
Japanese Office Action dated Sep. 28, 2010, for corresponding JP Patent Application 2009-137239.
Fukumoto Atsushi
Tanaka Kenji
Haley Joseph
Iluyomade Ifedayo
K&L Gates LLP
Sony Corporation
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