Recording waveform for mark-length modulation optical recording

Details Recording waveform for mark-length modulation optical recording Recording waveform for mark-length modulation optical recording

1990-10-17

1991-08-06

McElheny, Jr., Donald

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

050383388

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. Overwrite recording can also be accomplished with the single laser beam. An increased amount of information can be handled in the recording and reproduction.

REFERENCES:
patent: 4710911 (1987-12-01), Yamada et al.
patent: 4719594 (1988-01-01), Young et al.
patent: 4787077 (1988-11-01), Barton et al.
patent: 4894816 (1990-01-01), Sukeda et al.
patent: 4939717 (1990-07-01), Ohno et al.
"Optical Storage Media"; Bell et al; Proceedings of SPIE, vol. 420, line 6-10, 1983, Arl. Va.
"New Optical Recording Material for Video Disc System", Watanabe et al, J. Appl. Physics 54, (3), Mar. 1983, pp. 1256-1260.

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