Optical recording method and apparatus used to form a groove on

Details Optical recording method and apparatus used to form a groove on Optical recording method and apparatus used to form a groove on

1991-02-19

1992-04-14

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369109, G11B 700

Patent

active

051054043

ABSTRACT:
An optical recording method comprising steps of forming a groove on a surface of a recording medium, such as a recording disk, by projecting a write beam, such as a laser beam, onto the surface of the recording medium, and wobbling the write beam in a direction perpendicular to the groove to be formed, whereby the write beam is wobbled on the surface of the recording medium with a period of deviation not greater than one half of the diameter of the spot of the write beam. The groove formed by the present invention has a width greater than the diameter of the write beam and sharp edges for providing satisfactory characteristics in recording and reproducing.

REFERENCES:
patent: 4364118 (1982-12-01), Maeda et al.
patent: 4703408 (1987-10-01), Yonezawa et al.
patent: 4716560 (1987-12-01), Itonaga
patent: 4791627 (1988-12-01), Yonezawa
patent: 4982398 (1991-01-01), Yamamoto et al.

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