Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2007-04-03
2007-04-03
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S044230
Reexamination Certificate
active
11091449
ABSTRACT:
An optical pickup includes a light source emitting a laser beam and an optical path changing unit altering a traveling path of an incident beam. An objective lens, disposed on an optical path between the optical path changing unit and an optical disk, focuses the incident beam from the light source to form a light spot on the optical disk of the objective lens. The optical pickup further includes a photodetector and an detecting-correcting unit, arranged on the optical path between the optical path changing unit and the objective lens, performing at least one of detecting the thickness of the optical disk and correcting aberration caused by thickness variations of the optical disk. The objective lens includes a first transmitting portion divergently transmitting an incident beam, where the first transmitting portion is at a relatively near-axis region from an optical axis of the objective lens. A second transmitting portion transmits the incident beam, where the second transmitting portion is arranged facing the first transmitting portion. A first reflecting portion condenses and reflects the incident beam from the first transmitting portion, where the first reflecting portion is formed around the second transmitting portion. A second reflecting portion condenses and reflects the incident beam from the first reflecting portion towards the second transmitting portion, where the second reflecting portion is formed around the first transmitting portion.
REFERENCES:
patent: 4433340 (1984-02-01), Mashita et al.
patent: 4940890 (1990-07-01), Opheij et al.
patent: 5157555 (1992-10-01), Reno
patent: 5321550 (1994-06-01), Maruyama et al.
patent: 5416757 (1995-05-01), Luecke et al.
patent: 5920532 (1999-07-01), Yagi et al.
patent: 6159572 (2000-12-01), Kobayashi et al.
patent: 6266315 (2001-07-01), Lee et al.
patent: 6320708 (2001-11-01), Ueyanagi et al.
patent: 6324133 (2001-11-01), Ichimura
patent: 6339577 (2002-01-01), Hineno
patent: 6353582 (2002-03-01), Kikuchi
patent: 6377535 (2002-04-01), Chen et al.
patent: 6418108 (2002-07-01), Ueda et al.
patent: 6826133 (2004-11-01), Ichimura et al.
patent: 6938890 (2005-09-01), Yoo et al.
patent: 1186300 (1998-07-01), None
patent: 1229231 (1999-09-01), None
patent: 2-216626 (1990-08-01), None
patent: 02-216626 (1990-08-01), None
patent: 06-214154 (1994-08-01), None
patent: 6-214154 (1994-08-01), None
patent: 9-138343 (1997-05-01), None
patent: 09-138343 (1997-05-01), None
patent: 09-197264 (1997-07-01), None
patent: 9-197264 (1997-07-01), None
patent: 9-325270 (1997-12-01), None
patent: 09-325270 (1997-12-01), None
patent: 00/08642 (2000-02-01), None
patent: 2000-163794 (2000-06-01), None
patent: 2000-171612 (2000-06-01), None
patent: 2000-206411 (2000-07-01), None
patent: 2001-133689 (2001-05-01), None
patent: 2001-154095 (2001-06-01), None
patent: 2001-154096 (2001-06-01), None
patent: 2001-189031 (2001-07-01), None
patent: WO 99/27532 (1999-06-01), None
Notice to Submit Response issued Apr. 27, 2006 by the Korean Intellectual Property Office re: Korean Patent Application No. 1999-53856 (7 pp).
Cho Kun-ho
Jung Seung-tae
Lee Chul-woo
Shin Dong-ho
Yoo Jang-hoon
Stein, McEwen & Bui LLP
Tran Thang V.
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