Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-10-26
2009-11-24
Feild, Joseph H (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
Reexamination Certificate
active
07623434
ABSTRACT:
An objective optical lens for use in an optical pickup apparatus, includes: an optical surface divided into at least two areas including: a central area including a first diffractive structure; and a peripheral area including a second diffractive structure, the objective lens is a single lens and is commonly used for the first to third optical information recording media, the objective lens converges diffracted light fluxes with same diffraction order generated in the first diffractive structure onto information recording surfaces of the first to third optical information recording media, respectively, the objective lens converges diffracted light fluxes with different diffraction order generated in the second diffractive structure onto information recording surfaces of the first and second optical information recording media, respectively.
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European Search Report dated Nov. 6, 2008.
Kimura Tohru
Nomura Eiji
Feild Joseph H
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Haley Joseph
Konica Minolta Opto Inc.
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