Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-11-12
1998-02-10
Huber, Paul W.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369112, 369 4424, G11B 700
Patent
active
057176787
ABSTRACT:
An optical pickup device includes a light source which emits a laser beam to an optical disk. An objective lens converts the emission beam into a converging beam, the converging beam passing through a transparent layer of the optical disk and forming a light spot on a recording surface of the optical disk. A photodetecting unit generates a read-data signal based on a reflection beam from the optical disk. A beam converting unit converts a reflection beam directed to the photodetecting unit such that the reflection beam is allowed to enter the photodetecting unit when a first optical disk is accessed, and a central portion of the reflection beam is allowed to enter the photodetecting unit and a peripheral portion of the reflection beam is inhibited from entering the photodetecting unit when a second optical disk is accessed.
REFERENCES:
patent: 5097464 (1992-03-01), Nishiuchi et al.
patent: 5206852 (1993-04-01), Kim et al.
patent: 5281797 (1994-01-01), Tatsuno et al.
patent: 5416757 (1995-05-01), Luecke et al.
patent: 5621717 (1997-04-01), Finkelstein et al.
Huber Paul W.
Ricoh & Company, Ltd.
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