Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2006-03-21
2006-03-21
Hindi, Nabil (Department: 2655)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112160
Reexamination Certificate
active
07016290
ABSTRACT:
In an optical information medium comprising an information recording layer having a mark train of marks and spaces, the mark train is read out by scanning it with a laser beam and detecting a light intensity change pattern of reflected laser beam. Provided that the reflected laser beam includes polarized light components which define an angle θ with the mark train, a polarized light component giving θ=0 is x0component, and a polarized light component giving θ=90° is y0component, the mark train is read out utilizing at least a light intensity change of x0component. When pits or recorded marks having a size approximate to or below the resolution limit are read out, the present invention allows high read outputs to be obtained and prevents omission of readout signals.
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Atoda Nobufumi
Fukuda Hisako
Kikukawa Takashi
Nakano Takashi
Tominaga Junji
Hindi Nabil
National Institute of Advanced Industrial Science and Technology
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
TDK Corporation
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