Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1989-04-18
1991-12-17
Envall, Jr., Roy N.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 13, 369110, 369116, 360 59, 360114, G11B 700
Patent
active
050738887
ABSTRACT:
An optical pickup device for recording, reproducing or erasing an information, comprises a sole semiconductor laser beam source for emitting a luminous flux, a polarizer for receiving the luminous flux emitted from the sole semiconductor laser beam source and dividing the received luminous flux into a plurality of luminous fluxes, and a sole object lens for receiving a plurality of the divided luminous fluxes and converging each of a plurality of the received luminous fluxes on small spots on an optical information recording medium, respectively.
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Emoto Masami
Gotoh Hiroshi
Honda Syuichi
Koide Hiroshi
Takahashi Yoshitaka
Envall Jr. Roy N.
Ricoh & Company, Ltd.
Tran Thai
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