Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-03-19
2011-10-25
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S112010, C369S112030, C369S112050, C369S112060, C369S112150
Reexamination Certificate
active
08045432
ABSTRACT:
Light emitted from a radiation light source1passes through a diffraction grating3aand is separated into transmitted light a and +1st/−1st order diffracted lights b, c. These lights are collected through an objective lens7on tracks of an optical disc8in a partially overlapped state. Light reflected by the tracks passes through the objective lens7and is incident upon light diverging means13a. Subsequently, light corresponding to the transmitted light “a” diverges into two light beams that are respectively incident upon light detection regions A1, A2, light corresponding to the diffracted lights “b” and “c” respectively diverges into two light beams that are respectively incident upon light detection regions B1, B2, and C1, C2. A tracking error signal associated with the tracks of the optical disc8is generated by combining signals detected in the light detection regions A1, A2, B1, B2, C1, and C2.
REFERENCES:
patent: 5886964 (1999-03-01), Fujita
patent: 6144623 (2000-11-01), Inoue et al.
patent: 2001/0055248 (2001-12-01), Nagata et al.
patent: 2004/0228236 (2004-11-01), Sakai et al.
patent: 2005/0047292 (2005-03-01), Park et al.
patent: 2005/0088950 (2005-04-01), Tanimoto
patent: 2005/0180293 (2005-08-01), Ueyama et al.
patent: 2005/0199778 (2005-09-01), Kadowaki et al.
patent: 2005/0281141 (2005-12-01), Ono
patent: 2009/0316550 (2009-12-01), Choi et al.
patent: 1192024 (1998-09-01), None
patent: 9-81942 (1997-09-01), None
patent: 2000-133929 (2000-05-01), None
patent: 2003-331437 (2003-11-01), None
patent: 2003331437 (2003-11-01), None
patent: 2004-281026 (2004-10-01), None
patent: 2005-122869 (2005-05-01), None
patent: 2005-317063 (2005-11-01), None
patent: 2006-12213 (2006-01-01), None
Asada Jun-ichi
Momoo Kazuo
Nishiwaki Seiji
Bernardi Brenda
Hamre Schumann Mueller & Larson P.C.
Panasonic Corporation
Young Wayne
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