Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-09-16
2010-11-09
Agustin, Peter Vincent (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
Reexamination Certificate
active
07830773
ABSTRACT:
An optical pickup device in which a hologram element has a plurality of different diffraction directions. In the tracking standard state, the hologram element is divided into six areas by a straight line connecting two strength center points of two light beams, and by two straight lines that are perpendicular to the straight line. By adding the amount of light received by an area demarcated by two straight lines that pass the two strength center points, to the amount of light received by one of two outer areas sandwiching the area depending on the type of the light beam, it is possible to obtain a well-balanced tracking error signal for each of the two light beams.
REFERENCES:
patent: 5111448 (1992-05-01), Komma et al.
patent: 5272690 (1993-12-01), Bargerhuff et al.
patent: 5644413 (1997-07-01), Komma et al.
patent: 5687153 (1997-11-01), Komma et al.
patent: 6072579 (2000-06-01), Funato
patent: 6137752 (2000-10-01), Sakai
patent: 6937554 (2005-08-01), Ohuchida
patent: 6985424 (2006-01-01), Nakamura et al.
patent: 2002/0018432 (2002-02-01), Ohuchida
patent: 2003/0016448 (2003-01-01), Takasuka et al.
patent: 2003/0053211 (2003-03-01), Takasuka et al.
patent: 2004/0081043 (2004-04-01), Nishiwaki et al.
patent: 2005/0088948 (2005-04-01), Ohuchida
patent: 1 109 163 (2001-06-01), None
patent: 1 184 848 (2002-03-01), None
patent: 8-22624 (1996-01-01), None
patent: 9-245356 (1997-09-01), None
patent: 2001-202638 (2001-07-01), None
patent: 2001-256657 (2001-09-01), None
patent: 2002-56550 (2002-02-01), None
patent: 2002-123952 (2002-04-01), None
patent: 2003-338076 (2003-11-01), None
patent: 2004-47093 (2004-02-01), None
patent: 3518457 (2004-02-01), None
patent: 2004-158169 (2004-06-01), None
patent: WO 01/11615 (2001-02-01), None
Japanese Office Action issued in Japanese Patent Application No. 2006-544790, dated Jun. 1, 2010.
Ijima Shin'ichi
Kochi Yasuyuki
Nishimoto Masahiko
Okuda Takuya
Ono Masayuki
Agustin Peter Vincent
McDermott Will & Emery LLP
Panasonic Corporation
LandOfFree
Optical pickup for recording and reproducing information... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical pickup for recording and reproducing information..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup for recording and reproducing information... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4251395