Optical system for recording information in erasable and non-era

Details Optical system for recording information in erasable and non-era Optical system for recording information in erasable and non-era

1987-11-25

1990-07-24

Stephan, Steven L.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369100, 369116, G11B 1304, G11B 1112

Patent

active

049440373

ABSTRACT:
In an optical system for recording information on an erasable recording medium, first and second pulse recording laser beams can be emitted from a laser unit. The first laser beam is converged by an objective lens onto a recording layer of an optical disk to form a permanent recorded region on the recording layer. The second laser beam, which has a lower intensity than that of the first laser beam, is also converged onto the recording layer by the objective lens onto the recording layer to form an erasable recorded region on the recording layer. Thus, the erasable and permanent recorded regions are formed in the recording layer.

REFERENCES:
patent: 3665425 (1972-05-01), Feinleib
patent: 3820087 (1974-06-01), Chaudhari et al.
patent: 4238808 (1980-12-01), Tomita
patent: 4363116 (1982-12-01), Kleuters et al.
patent: 4376887 (1983-03-01), Greenaway et al.
patent: 4451914 (1984-05-01), LaBudde et al.
patent: 4467383 (1984-08-01), Ohta et al.
patent: 4566088 (1986-01-01), Yoshida et al.
patent: 4598395 (1986-07-01), Smith
Yamada et al., "Erasable Optical Disc Using TeO.sub.x Thin Film", Proceedings of Japan Display '83, pp. 40-48.
Welber et al., IBM Tech. Dis. Bulletin, vol. 15, No. 15, Oct. 1972, pp. 1588-1589.
Weiser, IBM Tech. Dis. Buttetin, vol. 15, No. 7, Dec. 1972, p. 2096.
Terao et al., "Chalcogenide Thin Films for Laser-Beam Recordings by Thermal Creation of Holes", J. Appl. Phys. 50(11), Nov./1979, pp. 6881-6886.
Japanese Patent Disclosure (Kokai), No. 60-32149.
Japanese Patent Disclosure (Kokai), No. 51-95807.

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