Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Reexamination Certificate
2007-12-25
2007-12-25
Neyzari, Ali (Department: 2627)
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
C369S275300, C369S275400, C369S283000, C204S192200
Reexamination Certificate
active
11051739
ABSTRACT:
The magneto-optical recording medium is comprised of a phase pit substrate/dielectric layer/recording layers/dielectric layer/reflection layer and a ROM and RAM can be simultaneously regenerated. The shape of the phase pit is constructed to be 5<100×Ip/Im<22 where Im is a reflection level on the mirror face and Ip is a phase pit signal output of the shortest mark when a regeneration light having polarization in a direction horizontal to the track direction of the medium is irradiated. Since the jitter of both the magneto-optical recording/regeneration signals and phase pit signals can be suppressed within an optimum range, the quality of the regeneration signals when ROM and RAM are simultaneously regenerated can be improved.
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Chikazawa et al.; “One Method of Realization Relating to Concurrent ROM-RAM Optical Disk”; pp. 1319-1324; 1992 (full translation attached).
Fujitsu Limited
Greer Burns & Crain Ltd.
Neyzari Ali
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