Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2006-08-15
2006-08-15
Patel, Gautam R. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S124120, C369S124030, C369S053190
Reexamination Certificate
active
07092347
ABSTRACT:
An optical pickup apparatus for compensating for the deviation in the thickness of the optical disk and method therefor. The optical pickup includes a light source which emits light, an optical path changer which changes a proceeding path of incident light, an objective lens which focuses incident light to form a light spot on an optical disk, a light splitter, provided on the optical path between the light source and the optical path changer, which splits incident light into at least two light beams including first and second light beams so that at least two light spots including a main light spot having no aberration and an auxiliary light spot having a predetermined spherical aberration are formed on the optical disk, a photodetector including first and second light receiving portions which respectively receive the first and second incident light beams reflected by the optical disk and passing through the optical path changer, and a signal processing portion, including a delay which delays the phase of a second signal in order to synchronize a first signal and the second signal which are detected and optoelectrically converted by the first and second light receiving portions, to compensate for the deviation in the thickness of the optical disk.
REFERENCES:
patent: 4564754 (1986-01-01), Sato et al.
patent: 4831613 (1989-05-01), Kanda
patent: 4957355 (1990-09-01), Sato
patent: 5671207 (1997-09-01), Park
patent: 5675564 (1997-10-01), Muramatsu et al.
patent: 5712842 (1998-01-01), Yamamoto et al.
patent: 5719846 (1998-02-01), Matoba et al.
patent: 5742437 (1998-04-01), Eguchi et al.
patent: 5896218 (1999-04-01), Iizuka
patent: 6005834 (1999-12-01), Maeda et al.
patent: 6040931 (2000-03-01), Miyazaki et al.
patent: 6097688 (2000-08-01), Ichimura et al.
patent: 6314064 (2001-11-01), Ueda et al.
patent: 6388967 (2002-05-01), Furukawa et al.
patent: 6392977 (2002-05-01), Ando et al.
patent: 6430137 (2002-08-01), Saimi et al.
patent: 6498330 (2002-12-01), Yoshida
patent: 6798731 (2004-09-01), Kim et al.
patent: 64-1122 (1989-01-01), None
patent: 1-315039 (1989-12-01), None
patent: 7-121876 (1995-05-01), None
patent: 7-320295 (1995-12-01), None
patent: 8-147709 (1996-06-01), None
patent: 8-212557 (1996-08-01), None
patent: 10-116433 (1998-05-01), None
patent: 10-116434 (1998-05-01), None
patent: 11-250475 (1999-09-01), None
patent: 11-259893 (1999-09-01), None
Kenji Yamamoto et al., “0.8-Numerial-Aperture Two-Element Objective Lens for the Optical Disk”, Jpn. J. Appl. Phys. vol. 36 (1997), pp. 456-459, Part 1, No. 1B, Jan. 1997.
Sakashi Ohtaki et al., “The Applications of a Liquid Crystal Panel for the 15 Gbyte Optical Disk Systems”, Jpn. J. Appl. Phys. vol. 38 (1999), pp. 1744-1749, Part 1, No. 3B, Mar. 1999.
Ahn Young-man
Chung Chong-sam
Kim Tae-kyung
Suh Hea-jung
Patel Gautam R.
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
LandOfFree
Optical pickup apparatus having disk thickness deviation... 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 apparatus having disk thickness deviation..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup apparatus having disk thickness deviation... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3644631