Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1995-11-01
1997-03-04
Epps, Georgia Y.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369 4437, 369122, 372 50, 257 82, G11B 700
Patent
active
056087160
ABSTRACT:
An optical recording/reproducing apparatus comprises a semiconductor laser having a plurality of radiative portions formed at different heights on a same substrate and a spot forming system for arranging beams from the plurality of radiative portions in the semiconductor laser to form a plurality of light spots on an information recording medium for effecting information record and reproduction. In the apparatus, the spot forming system concurrently forms a first recording light spot and a first reproducing light spot on a first information track on the information recording medium and concurrently forms a second recording light spot and a second reproducing light spot on a second information track different from the first information track on the information recording medium.
REFERENCES:
patent: 4860276 (1989-08-01), Ukita et al.
patent: 4955030 (1990-09-01), Manigaux et al.
patent: 4971415 (1990-11-01), Hara
patent: 5018127 (1991-05-01), Ando
patent: 5071786 (1991-12-01), Paoli
patent: 5105410 (1992-04-01), Maeda et al.
patent: 5115285 (1992-05-01), Menigaux et al.
patent: 5144616 (1992-09-01), Yasukawa et al.
patent: 5181161 (1993-01-01), Hirose et al.
patent: 5210730 (1993-05-01), Hayashi et al.
patent: 5485438 (1996-01-01), Koyama
patent: 5500869 (1996-03-01), Yoshida et al.
Patent Abstracts of Japan, Kokai No. 60-107885, vol. 9, No. 258, Oct. 1985.
Yamaguchi, "Monolithic 3-Beam Semiconductor Laser: Now a Practical Reality," Journal of Electronic Engineering, vol. 24, No. 248, Aug. 1987, pp. 54 through 56.
Patent Abstracts of Japan, Kokai No. 3-077387, vol. 15, No. 246, Jun. 1991.
Patent Absracts of Japan, Kokai No. 61-054688, vol. 10, No. 217, Jul. 1986.
Koyama Osamu
Yamawaki Takeshi
Canon Kabushiki Kaisha
Chu Kim-Kwok
Epps Georgia Y.
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