Optical pickup and opto-magnetic signal reproducing apparatus

Details Optical pickup and opto-magnetic signal reproducing apparatus Optical pickup and opto-magnetic signal reproducing apparatus

1998-02-24

1999-11-09

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, G11B 700

Patent

active

059827319

ABSTRACT:
An optical pickup includes a polarization component separation element which is formed as a unit or single piece of birefringence material. The separation element is not laminated obviating the need to carefully match the optical axes of the laminated pieces. Multiple reflections within the birefringent crystal which comprises the separation element improves the separation and resolution of the polarized components which are extracted from a laser beam reflected back off the media surface.

REFERENCES:
patent: 4873429 (1989-10-01), Kume et al.
patent: 5095476 (1992-03-01), Greve et al.
patent: 5404490 (1995-04-01), Matsubayashi et al.
patent: 5438562 (1995-08-01), Kobayashi et al.
patent: 5479387 (1995-12-01), Ando et al.
patent: 5579291 (1996-11-01), Matsumoto
patent: 5796701 (1998-08-01), Nishi et al.

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