Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1991-05-14
1992-06-30
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360 59, 360114, G11B 1304, G11B 1110, G11B 1112
Patent
active
051269856
ABSTRACT:
When information is recorded on a record carrier (1) of the thermomagnetic type, the thermomagnetic recording layer (4) is scanned by a magnetic field generated by a magnetic-field modulator (7). The magnetic field is modulated depending on an information signal (Vi). Moreover, the scanned portion of the record carrier (1) is at the same time locally heated by radiation pulses (10) generated by an optical scanning device (5). By means of radiation pulses (10) the record carrier is heated above a write temperature (Ts), above which temperature the magnetization of the record carrier assumes the direction dictated by the magnetic field. A synchronizing circuit (9) generates the control signal (Vm) for modulating the magnetic field and the control signal (Vr) for generating the radiation pulses, in such a way that at the end of the radiation pulses the field strength is sufficiently high for the heated area of the record carrier to be magnetized in the directio dictated by the magnetic field.
REFERENCES:
patent: 4712203 (1987-12-01), Saito et al.
Hartmann et al., "Erasable magneto-optical recording", Philips Technical Review, vol. 42, No. 2, Aug. 1985, pp. 37-47.
Philips Technical Review, vol. 42, No. 2, pp. 38-47.
Bongers Piet F.
Jacobs Bernardus A. J.
Spruit Johannes H. M.
van Tongeren Hendricus F. J. J.
Botjer William L.
Levy Stuart S.
U.S. Philips Corp.
LandOfFree
Method of recording information on a record carrier of the therm 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 of recording information on a record carrier of the therm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of recording information on a record carrier of the therm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1870380