Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-04-12
2011-04-12
Nguyen, Hoa T (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S044320
Reexamination Certificate
active
07924683
ABSTRACT:
An optical pickup apparatus comprises a first light source for emitting a first light flux having first wavelength λ1 (430 nm>λ1>380 nm), a second light source for emitting a second light flux having second wavelength λ2 (λ2>λ1), an objective optical system having phase structure thereon, and at least one moving optical element for guiding the light flux into the objective optical system, the moving optical element being moved in a direction parallel to an optical axis corresponding to the first light wavelength λ1 and the second light wavelength λ2, wherein the objective optical system has phase structure and satisfies M1=M2=0, where, M1 and M2 denote a first and second magnifications of the objective optical system for recording and/or reproducing the information on or from the first and second optical information media.
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Japanese Patent Appln No. 2004-109867, Examiner's Decision of Refusal, drafted Feb. 1, 2010, 2 pages.
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Hashimura Junji
Kimura Tohru
Mimori Mitsuru
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Fischer Mark L
Konica Minolta Opto Inc.
Nguyen Hoa T
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