Deflecting a light beam in the same direction and speed of a rec

Details Deflecting a light beam in the same direction and speed of a rec Deflecting a light beam in the same direction and speed of a rec

1993-12-22

1995-11-07

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4432, 369119, 369116, 3692754, G11B 700

Patent

active

054652480

ABSTRACT:
An optical recording device forms on a magneto-optical disk 10 a recording mark corresponding to a recording data by focusing a light beam d into a light spot on a projection start position on the moving magneto-optical disk 10 and by raising the temperature of a portion of the magneto-optical disk 10 exposed to the light spot. An optical reproduction device includes a light-beam deflecting section 2a having a polygon mirror 8, a holographic disk, and a plurality of semiconductor lasers for repeatedly performing a unidirectional scanning in synchronism with recording data or a recording clock signal by moving the light spot from the projection start position in a direction equal to the moving direction of the magneto-optical disk 10 and to follow the moving speed of the magnet-optical disk 10.

REFERENCES:
patent: 4130898 (1978-12-01), Urbach et al.
patent: 4815059 (1989-03-01), Nakayama et al.
patent: 4831626 (1989-05-01), Watanabe et al.
patent: 5126873 (1992-06-01), Ang
patent: 5136559 (1992-08-01), Nakayama
patent: 5140653 (1992-08-01), Taneya
patent: 5289444 (1994-02-01), Tanaka
patent: 5321684 (1995-06-01), Schaefer et al.
patent: 5383174 (1995-01-01), Numata et al.
"Holographic Laser Scanner", N. Nishida, JSPE, No. 56-10, p. 13 through 16, Oct. 1990.

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