Recording/reproducing apparatus for use with a photomagnetic rec

Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

369283, G11B 1100

Patent

active

059783206

ABSTRACT:
A recording/reproducing apparatus for use with a photomagnetic recording medium. The apparatus comprises a magnetic coil and an optical system having a numerical aperture (NA) greater than 0.8 and arranged such that an optical axis thereof traverses the center of the magnetic coil. The photomagnetic recording medium has a magneto-optic recording film and a transparent protective layer having a thickness HCO formed sequentially on a substrate. The magnetic coil and the optical system are arranged on the transparent protective layer side of the photomagnetic recording medium when the photomagnetic recording medium is used with the apparatus and such that a combined distance equal to the thickness HCO and a distance d between a surface of the magnetic coil and an adjacent surface of the photomagnetic recording medium has a value of 0 .mu.m.ltoreq.d.ltoreq.145 .mu.m. The thickness HCO of the transparent protective layer may have a values of 0 .mu.m.ltoreq.HCO.ltoreq.100 .mu.m, and the distance d may have a value not larger than 45 .mu.m. Additionally, an innermost radius Ri of the magnetic coil may have a value of 290 .mu.m or less.

REFERENCES:
patent: 5197049 (1993-03-01), Wehrenberg

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Recording/reproducing apparatus for use with a photomagnetic rec does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recording/reproducing apparatus for use with a photomagnetic rec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recording/reproducing apparatus for use with a photomagnetic rec will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2145022

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.