Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1987-12-24
1990-04-17
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369122, 372 29, 372 31, G11B 700
Patent
active
049186817
ABSTRACT:
A data reproducing apparatus is disclosed which permits stabilization of the light output of a light source, thereby to permit reliable reproduction of data. When recording data on an optical disk and also when reproducing the recorded data by illuminating the optical disk by means of a laser beam from a semiconductor laser, an idling current is supplied in advance to the semiconductor laser, to such an extent that the semiconductor laser does not emit a laser beam. As a result of the preliminary supply of the idling current, the output of the semiconductor laser is stabilized.
REFERENCES:
patent: 4509156 (1985-04-01), Ohara et al.
patent: 4695994 (1987-09-01), Steebergen et al.
patent: 4799224 (1989-01-01), Bottacchi et al.
Kabushiki Kaisha Toshiba
Psitos Aristotelis M.
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