Optical information recording medium, optical information...

Details Optical information recording medium, optical information... Optical information recording medium, optical information...

2005-03-01

2005-03-01

Cao, Allen (Department: 2652)

Dynamic optical information storage or retrieval

Optical storage medium structure

Reexamination Certificate

active

06862740

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 the refractive index and thickness of the protective layer are determined 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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Japanese International Search Report for PCT/JP01/08502, dated Jan. 29, 2002.
English translation of Japanese International Search Report for PCT/JP01/08502, dated Jan. 29, 2002.

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