Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1991-06-10
1993-10-26
McElheny, Jr., Donald E.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
G11B 700
Patent
active
052572560
ABSTRACT:
A method of recording information by changing a recording medium through irradiation with an energy beam such as a light beam, electron beam or the like. A single pulse or a plurality of pulses are employed for forming recorded dots. The pulse has a pulse width shorter than a time required for the center of energy beam spot to move from one to other end of the dot upon recording thereof. By virtue of the possibility of reversible change even in a recording film susceptible to high rate speed of change, the rate of information transfer can be increased. Over-write recording can also be accomplished with the single laser beam. An increased amount of information can be handled in the recording and reproduction.
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Andoo Keikichi
Nishida Tetsuya
Ohta Norio
Terao Motoyasu
Yasuoka Hiroshi
Hitachi , Ltd.
McElheny Jr. Donald E.
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