Optical data recording and reproducing system with control of hi

Details Optical data recording and reproducing system with control of hi Optical data recording and reproducing system with control of hi

1987-03-17

1988-11-22

McElheny, Jr., Donald

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369116, 369124, G11B 7125

Patent

active

047870788

ABSTRACT:
In an optical data recording and reproducing system in which recording and reproducing data are carried out with a semiconductor laser, circuitry is provided to reduce the level of a high frequency current to be superposed on the laser during a data recording operation relative to the level during a data reproducing operation, to provide laser output only when necessary, to prolong laser life.

REFERENCES:
patent: 3866238 (1975-02-01), Monroe
patent: 4283785 (1981-08-01), Miyauchi et al.
patent: 4480325 (1984-10-01), Aiki et al.
patent: 4507767 (1985-03-01), Taksugi
patent: 4656618 (1987-04-01), Kaku et al.
patent: 4701609 (1987-10-01), Koishi et al.
patent: 4712218 (1987-12-01), Ohnuki et al.

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