Multiple focus optical pickup system for alternatively reading a

Details Multiple focus optical pickup system for alternatively reading a Multiple focus optical pickup system for alternatively reading a

1996-09-25

1998-01-13

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

G11B 700

Patent

active

057086435

ABSTRACT:
An optical pickup system for alternatively detecting an information signal from, e.g., a pair of optical disks loaded on a disk tray is described, wherein each of the optical disks may have a different thickness. The optical pickup system includes a light source for generating a light beam and an optical device provided with a first and a second parts, wherein a portion of the light beam impinging onto the first part is focused onto the first optical disk, and the remaining portion of the light beam impinging onto the second part is focused onto the second optical disk, thereby allowing the optical pickup system to detect an information signal from the respective optical disk.

REFERENCES:
patent: 5097464 (1992-03-01), Nishiuchi et al.
patent: 5235581 (1993-08-01), Miyagawa et al.
patent: 5446565 (1995-08-01), Komma et al.
Yoshiaki Komma et al."Dual Focus Optical Head For 0.6mm and 1.2mm Disks",Proceedings of the SPIE-1994 Topical Meeting on Optical Data Storage,vol.2338,pp.282-288,16-18 May 1994.

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