Optical disk apparatus for accessing optical disks with differen

Details Optical disk apparatus for accessing optical disks with differen Optical disk apparatus for accessing optical disks with differen

1998-05-07

2000-11-14

Tran, Thang V.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369110, 369112, G11B 700

Patent

active

061479470

ABSTRACT:
An optical disk apparatus is described which can read information from and write information to optical disk of different thicknesses. The optical disk apparatus includes coupling lenses which alter the focusing capabilities of an objective lens which controls reading and writing to the optical disk. Thus, the present invention allows both "standard density" and "high density" optical disks to be accessed by the same optical disk apparatus.

REFERENCES:
patent: 5661711 (1997-08-01), Tanaka et al.
patent: 5777970 (1998-07-01), Kajiyama et al.
patent: 5793734 (1998-08-01), Tsuchiya et al.
patent: 5875167 (1999-02-01), Katayama
patent: 5910937 (1999-06-01), Akiba et al.

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