Magnetic image recording device

Recorders – Magnetographic – Radiation sensitive

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G01D 1512

Patent

active

044582528

ABSTRACT:
In a magnetic image recording device, selected portions of a magnetized magnetic medium are heated to temperatures less than the Curie temperature of the medium to reduce the local magnetization intensity and form a magnetic latent image. If desired, the temperatures of different portions can be varied to produce a shaded image.

REFERENCES:
patent: 2915594 (1959-12-01), Burns, Jr. et al.
patent: 3582570 (1971-06-01), Cushner et al.
patent: 4314257 (1982-02-01), Tokunga et al.
Kurtzig et al., Reorientation and Curie Point Writing in Orthoferrites, J. of Applied Physics, Mar. 15, 1971, pp. 1804-1805, 360/59.
Huth, Calculations of Stable Domain Radii Produced by Thermomagnetic Writing, IBM J. Res. Develop., Aug. 8, 1973, pp. 100-109, 360/59.

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