Integrated optical head with an emitting light splitting polariz

Details Integrated optical head with an emitting light splitting polariz Integrated optical head with an emitting light splitting polariz

1996-05-31

1998-08-04

Nelms, David C.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4414, 369 4423, 369110, 369 13, 369122, G11B 708

Patent

active

057905045

ABSTRACT:
A magneto-optical pick-up for recording and reproducing information to an information recording medium comprises an optical module comprising an integral light emitting element and receptor element having plural light reception areas, and a diffraction grating on the light incident/emission plane, an objective lens, a polarizing prism provided integrally to the optical module in the light path between the light-emitting element and an objective lens and having the reflectivity and transmittance differing for P-polarized and S-polarized lights, and a polarizing element provided internally or integrally to the optical module which divides the light reflected by or passed through the polarizing prism into light having at least two mutually-perpendicular polarization components to guide the divided lights to the receptor element.

REFERENCES:
patent: 5453961 (1995-09-01), Brazas
patent: 5526330 (1996-06-01), Ogata et al.
patent: 5528575 (1996-06-01), Saito
patent: 5557601 (1996-09-01), Nishikawa
patent: 5559769 (1996-09-01), Ando et al.

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