Magneto-optical information reading apparatus

Details Magneto-optical information reading apparatus Magneto-optical information reading apparatus

1983-09-06

1986-02-04

Moffitt, James W.

Static information storage and retrieval

Information masking

Polarization

G11C 1306

Patent

active

045690359

ABSTRACT:
This specification discloses a magneto-optical information reading apparatus which comprises a device for causing a light beam polarized in a predetermined direction to enter a magnetic recording medium on which information is recorded, an analyzer provided in the optical path of the light beam modulated by the magneto-optic effect in accordance with the information, and a photodetector having the current amplifying function and photoelectrically detecting the light beam transmitted through the analyzer, and in which the following equation is substantially satisfied: ##EQU1## where .phi. is the transmission axis azimuth of the analyzer relative to the predetermined direction of polarization and .eta. is the extinction factor of the analyzer.

REFERENCES:
IEEE Transactions on Magnetics-Dec. 1969, pp. 700-716.

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