Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2006-09-26
2006-09-26
Huber, Paul W. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S275400
Reexamination Certificate
active
07113470
ABSTRACT:
An optical recording and reproducing method is able to record and reproduce information by using an optical system using recording and reproducing light with a wavelength selected in a range of from 780 nm±10 nm and an objective lens with a numerical aperture NA selected in a range of from 0.45±0.01 and records and reproduces first and second optical recording mediums having different recording capacities. The first optical recording medium is constructed by using a substrate with a track pitch Tp1being selected in a range of from 1.5 μm to 1.7 μm and a groove depth d1being selected in a range of from 70 nm to 90 nm, and the second optical recording medium is constructed by using a substrate11with a track pitch Tp2being selected in a range of from 1.2 μm to 1.3 μm and a groove depth d2of the groove12being selected in a range of from 150 nm to 180 nm. This, the optical recording medium has compatibility with existing optical discs and has a recording density high enough to record a moving picture.
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Fukushima Yoshihito
Miyata Kazutomo
Ota Teruyuki
Watanabe Makoto
Depke Robert J.
Huber Paul W.
Rockey, Depke, Lyons & Kitzinger LLC
Sony Corporation
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