Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2007-10-16
2007-10-16
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
C369S044320, C369S053140
Reexamination Certificate
active
10355146
ABSTRACT:
An objective lens in which a first wavelength is used in reading a first optical disk, a second wavelength is used in recording or reading a second optical disk, and a phase shifter provided with annular step portions having a center coincident with an optical axis is formed in a single surface of the objective lens, the phase shifter producing a phase difference with respect to light having the first wavelength and light having the second wavelength, is presented. The objective lens can read well both a CD and a DVD.
REFERENCES:
patent: 4929956 (1990-05-01), Lee et al.
patent: 5303221 (1994-04-01), Maeda et al.
patent: 5513158 (1996-04-01), Ohsato
patent: 5600614 (1997-02-01), Katayama
patent: 5615200 (1997-03-01), Hoshino et al.
patent: 5638353 (1997-06-01), Takahashi
patent: 5659533 (1997-08-01), Chen et al.
patent: 5665957 (1997-09-01), Lee et al.
patent: 5696750 (1997-12-01), Katayama
patent: 5703856 (1997-12-01), Hayashi et al.
patent: 5703862 (1997-12-01), Lee et al.
patent: 5717674 (1998-02-01), Mori et al.
patent: 5734637 (1998-03-01), Ootaki et al.
patent: 5754512 (1998-05-01), Komma et al.
patent: 5768242 (1998-06-01), Juday
patent: 5809000 (1998-09-01), Choi
patent: 5815293 (1998-09-01), Komma et al.
patent: 5912868 (1999-06-01), Hayashi et al.
patent: 5930214 (1999-07-01), Kasahara et al.
patent: 6017659 (2000-01-01), Lee et al.
patent: 6040943 (2000-03-01), Schaub
patent: 6061324 (2000-05-01), Arai et al.
patent: 6118594 (2000-09-01), Maruyama
patent: 6118749 (2000-09-01), Arai et al.
patent: 6134055 (2000-10-01), Koike
patent: 6215756 (2001-04-01), Shimano et al.
patent: 6243349 (2001-06-01), Arai et al.
patent: 6256284 (2001-07-01), Shimano et al.
patent: 6285645 (2001-09-01), Shimozono
patent: 6363037 (2002-03-01), Yamazaki
patent: 6462874 (2002-10-01), Soskind
patent: 6717906 (2004-04-01), Shimano
patent: 6873588 (2005-03-01), Mizuno et al.
patent: 2001/0005351 (2001-06-01), Shimano et al.
patent: 2001/0017830 (2001-08-01), Arai et al.
patent: 0 587 297 (1994-03-01), None
patent: 0 747 893 (1996-12-01), None
patent: 0 803 867 (1997-10-01), None
patent: 0962921 (1999-12-01), None
patent: 1122573 (2001-08-01), None
patent: 1 143 429 (2001-10-01), None
patent: 4-178931 (1992-06-01), None
patent: 5-81698 (1993-04-01), None
patent: 6-96466 (1994-04-01), None
patent: 6-259804 (1994-09-01), None
patent: 11-287948 (1999-10-01), None
patent: 2000-81566 (2000-03-01), None
patent: 2000-268392 (2000-09-01), None
patent: 2000-311374 (2000-11-01), None
patent: 2001-229567 (2001-08-01), None
patent: WO 00/00964 (2000-01-01), None
Patent Abstracts of Japan, JP 11-287948, Oct. 19, 1999 (Non-English reference was filed on Jan. 31, 2003).
U.S. Appl. No. 09/822,356, filed Apr. 2, 2001, Shimozono.
U.S. Appl. No. 10/355,146, filed Jan. 31, 2003, Shimozono.
Asahi Glass Company Limited
Patel Gautam R.
LandOfFree
Objective lens having two aspheric surfaces and a phase... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Objective lens having two aspheric surfaces and a phase..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objective lens having two aspheric surfaces and a phase... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3857098