Method and apparatus for reading or measuring magneto-optical st

Details Method and apparatus for reading or measuring magneto-optical st Method and apparatus for reading or measuring magneto-optical st

1987-06-19

1989-07-11

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 13, 360114, G11B 700

Patent

active

048478237

ABSTRACT:
A scanning confocal optical imaging system is utilized to read or measure data magnetically recorded on a magneto-optic disk. The system includes a laser for producing a linearly polarized beam and a beam splitter for directing the transmitted beam to the disk and for deflecting a portion of the reflected return beam from the disk to a photodetector. A pinhole plate is placed between the beam splitter and the disk for restricting the size of the transmitted and reflected beams, and a polarizer is positioned between the beam splitter and the photodetector to receive the deflected return beam and provide an output that discriminates between the differing directions of rotation of the polarization plane of the transmitted beam by the magnetized area on the disk so that the direction of magnetization of the magnetized area can be read by the photodetector.

REFERENCES:
patent: 4655590 (1987-04-01), Aagano et al.

Affiliated with

Also associated with

Rating

Method and apparatus for reading or measuring magneto-optical st does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for reading or measuring magneto-optical st, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reading or measuring magneto-optical st will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-442411