Compact optical head including two light emitters having paralle

Details Compact optical head including two light emitters having paralle Compact optical head including two light emitters having paralle

1997-12-12

2000-05-30

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 58, G11B 700

Patent

active

060698624

ABSTRACT:
The dichroic mirror or a polarized beam splitter is installed between a mirror and an objective lens as a beam synthesize/split means, in an optical system corresponding to a second disk and an optical system corresponding to a first disk arranged so as to form a two-layer structure. The dimension of the optical head in the width, length, and thickness directions are designed moderately.

REFERENCES:
patent: 5513164 (1996-04-01), Tanaka et al.
patent: 5777970 (1998-07-01), Kajiyama et al.
patent: 5912868 (1999-06-01), Hayashi et al.

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