Optical apparatus and method for reproducing information recorde

Details Optical apparatus and method for reproducing information recorde Optical apparatus and method for reproducing information recorde

1981-09-28

1983-10-11

Stellar, George G.

Dynamic magnetic information storage or retrieval

Head

Read only detector using light for reading magnetically...

369110, G11B 532

Patent

active

044096313

ABSTRACT:
An optical apparatus to reproduce information recorded by a magnetic recording medium in utilization of the interaction between light and magnetism, the apparatus being constructed with a light source to supply a light beam for reproduction; a polarizing beam splitter, the transmission and reflection factors of which are dependent on the polarizing direction of the light beam, and which leads the light beam for reproduction from the light source to the magnetic recording medium, and, in interaction with the magnetism in the magnetic recording medium, receives again the emitting light beam for reproduction to lead it to a direction different from the direction of the light source; and a rotatory polarizing device disposed in a light path of the light beam for reproduction between the polarizing beam splitter and the magnetic recording medium, and to rotate the polarized plane of the light beam for reproduction.

REFERENCES:
patent: 3983317 (1976-09-01), Glorioso
patent: 4337535 (1982-06-01), Van Megen et al.

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