Magneto-optic playback apparatus including astigmatic diffractin

Details Magneto-optic playback apparatus including astigmatic diffractin Magneto-optic playback apparatus including astigmatic diffractin

1988-08-22

1991-01-29

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 369 4411, G11B 1304, G11B 7135

Patent

active

049891898

ABSTRACT:
Apparatus for playing-back information on a magneto-optic recording element includes a diffraction grating for splitting a read beam reflected from the recording element and modified by the recorded information into three beams. Two of such beams (i.e., the upper and lower first order diffracted beams) are used in a differential detection scheme to recover the recorded information, and the third beam (i.e., the zero order beam) is used to provide focus and/or tracking information.

REFERENCES:
patent: 4451863 (1984-05-01), Yanagida et al.
patent: 4525625 (1985-06-01), Abe
patent: 4558440 (1985-12-01), Tomita
patent: 4633074 (1986-12-01), Kunz
patent: 4858218 (1989-08-01), Takagi et al.

Affiliated with

Also associated with

Rating

Magneto-optic playback apparatus including astigmatic diffractin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magneto-optic playback apparatus including astigmatic diffractin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optic playback apparatus including astigmatic diffractin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-819645