Magneto-optical head with birefringent polarizer

Details Magneto-optical head with birefringent polarizer Magneto-optical head with birefringent polarizer

1994-06-17

1995-06-06

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 4414, 369112, G11B 1100, G11B 700

Patent

active

054228662

ABSTRACT:
An magneto-optical head that detects information recorded magneto-optically in accordance with changes in polarization conditions of light reflected from a magneto-optical recording medium on which convergent light is projected, includes a birefringent polarizer having a plane of incidence on which a polarization-separation coating is formed and a plane of emergence that is substantially in parallel with the plane of incidence. The birefringent polarizer composed of at least two crystallines is arranged to be inclined to an optical path along which the reflected light advances toward a photo-detector as a convergent light. A chief ray of reflected light from a recording medium enters the plane of incidence of the birefringent polarizer with an incident angle between 55.degree. and 70.degree..

REFERENCES:
patent: 5132950 (1992-07-01), Sato et al.
patent: 5272685 (1993-12-01), Ando

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