Method of recording and reproduction of information using a reco

Details Method of recording and reproduction of information using a reco Method of recording and reproduction of information using a reco

1989-09-26

1993-06-08

LaRoche, Eugene R.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, 369 13, 369286, 360 2, G11B 720

Patent

active

052185990

ABSTRACT:
A recording medium is provided with a recording film having opto-magnetic characteristics formed on the substrate, with first information being recorded in advance in the form of pit strings of a phase structure. Second information is recorded over the first information through the application of a magnetic field with polarities corresponding to the second information in the presence of the irradiation of a high-power radiation beam, without damaging the record of the first information. The first and second information are produced independently and simultaneously with a single spot in the same area by use of different signal reproduction mechanisms for the first information and second information. The first information (ROM information) is reproduced as the variation in the amount (intensity) of the reflected light from the opto-magnetic recording film, and the second information (RAM information) is reproduced by detecting the rotational angle of the reflected light, based on the Kerr effect, from the opto-magnetic film concurrently with the reproduction of the first information using a single spot.

REFERENCES:
patent: 4509161 (1985-04-01), Van de Leest et al.
patent: 4564929 (1986-01-01), Yonezawa et al.
patent: 4703469 (1987-10-01), Pettigrew et al.
patent: 4733385 (1988-03-01), Henmi et al.
patent: 4736352 (1988-04-01), Satoh et al.
patent: 4750152 (1988-06-01), Yonekubo et al.
patent: 4769802 (1988-09-01), Tatsduguchi
patent: 4817075 (1989-03-01), Kikuchi et al.
patent: 4868373 (1989-09-01), Opheij et al.
patent: 4879703 (1989-10-01), Kaku et al.
patent: 4905215 (1990-02-01), Hattori et al.
patent: 4940618 (1990-07-01), Hamada et al.
patent: 4961183 (1990-06-01), Tinet

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