Dynamic optical information storage or retrieval – Optical storage medium structure
Reexamination Certificate
2005-10-25
2005-10-25
Cao, Allen (Department: 2652)
Dynamic optical information storage or retrieval
Optical storage medium structure
Reexamination Certificate
active
06959447
ABSTRACT:
An optical information recording medium in which the ranges of the refractive index and thickness of a protective layer in a case where the protective layer is constituted by a plurality of layers are newly specified and the refractive index and thickness of the protective layer are determine in these ranges, thereby ensuring that even if variation in thickness of the protective layer to ±3 μm is tolerated, spherical aberration in the optical information recording medium is substantially to within 30 mλrms.
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Hayashi Kazuhiro
Ogata Daisuke
Yasuda Akihiro
Cao Allen
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
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