Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1993-08-23
1995-08-22
Epps, Georgia Y.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369100, 3692751, 3692754, 369112, 369120, G11B 700, G02B 610
Patent
active
054446899
ABSTRACT:
An optical recording medium includes a substrate, first information for modulating a phase of read light radiated on the substrate, and second information for modulating an amplitude of the read light radiated on the substrate. The first information and the second information are arranged in parallel to each other on the substrate in a predetermined arrangement direction. A method and apparatus for performing reproduction using this medium are also disclosed. The method includes the step of radiating read light on the optical recording medium in which the first information for modulating the phase of the read light and the second information for modulating the amplitude of the read light are recorded, the step of receiving light through the optical recording medium, the detection step of independently detecting phase modulation information and amplitude modulation information of the optical recording medium using the received light, and the step of reproducing the first information and the second information from the information in the detection step.
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Arimoto Rieko
Iwasaki Jun
Iwasaki Yutaka
Ohki Hiroshi
Chu Kim-Kwok
Epps Georgia Y.
Nikon Corporation
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