Multiple focus optical pickup system

Details Multiple focus optical pickup system Multiple focus optical pickup system

1996-08-30

1998-01-13

Edun, Muhammad N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369103, G11B 712

Patent

active

057086419

ABSTRACT:
An optical pickup system for reproducing information signals stored on a first and a second optical disks loaded on a disk tray is described wherein each of the optical disks has a different thickness. The optical system includes a light source for generating a parallel light beam and an optical device provided with a first and a second part, wherein a portion of parallel light beam impinging onto the first part is focused onto the first optical disk, and the remaining portion of the parallel light beam impinging onto the second part is focused onto the second optical disk, thereby allowing the optical pickup system to read the information signals off the respective optical disk.

REFERENCES:
patent: 4210391 (1980-07-01), Cohen
patent: 4936666 (1990-06-01), Futbey
patent: 5132843 (1992-07-01), Aoyama et al.
patent: 5231620 (1993-07-01), Ohuchida
patent: 5446565 (1995-08-01), Komma et al.
patent: 5583843 (1996-12-01), Horinouchi

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