Method and device for initializing optical recording medium of p

Details Method and device for initializing optical recording medium of p Method and device for initializing optical recording medium of p

1997-03-25

1999-02-23

Edun, Muhammad N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, 369112, 369116, G11B 700

Patent

active

058751602

ABSTRACT:
A device for initializing an optical recording medium includes a semiconductor laser diode, and an optical system which projects a laser beam emitted from the semiconductor laser diode onto the optical recording medium. A half-value width of a spot of the laser beam focused on the optical recording medium is equal to 1/2 to 1/6 times a half-value width of a near-field pattern of the semiconductor laser diode in a direction parallel to a junction interface of the semiconductor laser diode, so that the optical recording medium can be evenly initialized by the laser beam.

REFERENCES:
patent: 5136569 (1992-08-01), Fennema et al.
"5th Phase Change Recording Study Meeting," 1993, pp. 30-34.
"Laser Study," vol. 18, No. 8, pp. 555-572.

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