Information reproducing device

Details Information reproducing device Information reproducing device

1997-09-26

1998-08-04

Edun, Muhammad N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, G11B 7135

Patent

active

057905010

ABSTRACT:
A laser beam emitted from a laser diode passes through a polarizing separating plane of a first polarization beam splitter and forms a beam spot on a magneto-optic disk. The plane of polarization of the laser beam that is reflected at a magnetic film provided on the magneto-optic disk is rotated by the Kerr effect in a fixed direction depending on the direction of magnetization of the magnetic film. The reflected laser beam is made incident on the polarizing separating plane of the first polarization beam splitter. The angle of the polarizing separating plane of the first polarization beam splitter is adjusted with respect to an optic path of the laser beam so that the P polarization component of the laser beam is reflected by 20%.

REFERENCES:
patent: 5223970 (1993-06-01), Oono et al.
patent: 5297114 (1994-03-01), Itoh et al.
patent: 5309423 (1994-05-01), Noguchi et al.
patent: 5341246 (1994-10-01), Oono et al.
patent: 5383173 (1995-01-01), Kim et al.
patent: 5471456 (1995-11-01), Tokumaru et al.

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