Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-02-18
2008-12-02
Dinh, Tan Xuan (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112130
Reexamination Certificate
active
07460460
ABSTRACT:
An objective optical system for use in an optical pickup apparatus for converging first and second parallel light fluxes includes: a first lens group having a phase structure; and a second lens group, wherein the first lens group and the second lens group are arranged in the objective optical system in this order from a longer conjugate distance side of the objective optical system, and a wavefront aberration of the first lens group WL1λ1, a wavefront aberration of the second lens group WL2λ1, a magnification of the second lens group M, a wavefront aberration of the second lens group WL2λ2, a wavefront aberration of the objective optical system WOBJλ2are satisfy predescribed expressions.
REFERENCES:
patent: 5920532 (1999-07-01), Yagi et al.
patent: 6166854 (2000-12-01), Katsuma
patent: 6687209 (2004-02-01), Ota et al.
patent: 7206276 (2007-04-01), Kimura et al.
patent: 2004/0114254 (2004-06-01), Kimura et al.
patent: 2004/0213134 (2004-10-01), Takada et al.
patent: 1 154 417 (2001-11-01), None
patent: 1 304 689 (2003-04-01), None
patent: 1 422 703 (2004-05-01), None
patent: 1 462 696 (2004-09-01), None
patent: WO 02/082437 (2002-10-01), None
Katayama R. et al. “Dual-Wavelength Optical Head with a Wavelength-Selective Filter for 0.6- and 1.2-mm-thick-Substrate Optical Disks”, Applied Optics, Optical Society of America, Washington, DC, US, vol. 38, No. 17, 10, pp. 3778-3786, Jun. 10, 1999.
European Search Report issued in the corresponding foreign application No. EP 05 25 1013.
Cohen Pontani Lieberman & Pavane LLP
Dinh Tan Xuan
Heyi Henok G
Konica Minolta Opto Inc.
LandOfFree
Objective optical system, optical pickup apparatus and... 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 optical system, optical pickup apparatus and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objective optical system, optical pickup apparatus and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4048595