Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1994-04-21
1997-02-04
Epps, Georgia Y.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 54, G11B 700
Patent
active
056006217
ABSTRACT:
In a laser output control device for use in an optical information recording and reproducing apparatus which uses output light from a semiconductor laser device to record and reproduce information onto and from an optical information recording medium, a light receiving element is provided on the peripheral portion of a laser light emitting window formed in a housing of the semiconductor laser device. The peripheral component of forward radiated light of the laser light output from the semiconductor laser device is received by the light receiving element, so as to control the output power of the semiconductor laser device in accordance with output of the light receiving element corresponding to the received light.
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patent: 5023858 (1991-06-01), Nakayama
patent: 5050155 (1991-09-01), Kurata et al.
patent: 5146449 (1992-09-01), Shimozawa
patent: 5191204 (1993-03-01), Dickson et al.
patent: 5410529 (1995-04-01), Kurata et al.
European Search Report dated Aug. 24, 1994, Appl. No. EP 94 10 6095.
Nakamura Eiichi
Noda Kazuo
Yamazaki Koichi
Epps Georgia Y.
Huber P. W.
Nippon Conlux Co., Ltd.
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