Dynamic information storage or retrieval – Simultaneous diverse types of storage or retrieval
Patent
1996-09-06
1998-09-15
Dinh, Tan
Dynamic information storage or retrieval
Simultaneous diverse types of storage or retrieval
369126, G11B 1300
Patent
active
058089730
ABSTRACT:
A magnetic recording and optical readout apparatus and method, wherein a recording and readout head member records and reproduces a signal while moving relatively to a magnetic recording medium. The head member has a magnetic recording head and a readout head in a body. The head member is supported by a suspension so as to contact the medium or to keep a slight distance from the medium by a lifting-up force being generated by air flow, while moving relatively to the medium. A laser beam is radiated from a laser emitting element through a light transmitting hole formed in a light intercepting layer, whose diameter is smaller than the laser beam wavelength of the laser emitting element. By radiating the laser beam through the hole, localized near field electromagnetic waves are generated and reflected at the medium. The reflected electromagnetic waves bear changes of a polarization angle corresponding to the recorded information, which are detected by the readout head to reproduce the signal.
REFERENCES:
patent: 4604520 (1986-08-01), Pohl
patent: 5200936 (1993-04-01), Allenspach et al.
patent: 5272330 (1993-12-01), Betzig et al.
patent: 5343460 (1994-08-01), Miyazaki et al.
patent: 5389779 (1995-02-01), Betzig et al.
patent: 5602820 (1997-02-01), Wickramasinghe et al.
Near-Field Magneto-Optics and High Density Data Storage; E. Betzig, et al; Appl. Phys. Lett. 61(2), Jul. 13, 1992; pp. 142-144.
Optical Stethoscopy: Image Recording with Resolution; D.W. Pohl, et al; Appl. Phys. Lett. 44(7), Apr. 1, 1984; pp. 651-653.
Formation of Small Magnetic Domains by Scanning Near-Field Optical Microscope; T. Shintani, et al; Digest of the 18th Annual Conference on Magnetic in Japan; pp. 309a-309b, 1994 (no month available).
Dinh Tan
Kabushiki Kaisha Toshiba
LandOfFree
Near field recording and reproducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Near field recording and reproducing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near field recording and reproducing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-95777