Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2007-03-02
2010-02-02
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112130, C369S112260
Reexamination Certificate
active
07656770
ABSTRACT:
An optical pickup apparatus according to the present invention includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical element. The objective optical element has an optical surface including at least two areas provided with optical path difference providing structures. The objective optical element converges the first to third light fluxes each passing through the predetermined areas on the objective optical element onto respective information recording surfaces of the first to third optical disks. One of the optical path difference providing structures includes a first basic structure and a second basic structure which are predetermined optical path difference providing structures and overlap with each other.
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European Search Report dated Mar. 31, 2009.
Mori Nobuyoshi
Nakamura Kentarou
Nomura Eiji
Ota Kohei
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Huber Paul
Konica Minolta Opto Inc.
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