Grooving apparatus and grooving method

Details Grooving apparatus and grooving method Grooving apparatus and grooving method

2005-08-16

2005-08-16

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S101000

Reexamination Certificate

active

06930961

ABSTRACT:
Disclosed is a grooving apparatus which can carry information on an information track at high recording density when carrying the information on the information track through a change in shape of a groove and which also can improve the signal-to-noise ratio of the information under reproduction. A grooving apparatus for forming a groove to function as an information track in an optical disk comprises an electron beam generator which emits an electron beam, an objective lens which focuses the emitted electron beam on the optical disk and which focuses the electron beam on a smaller range than the size of the groove, and an X-direction deflector and a Y-direction deflector which controls the electron beam so that the electron beam is focused in position on the optical disk, thereby forming the groove in the optical disk.

REFERENCES:
patent: 3943302 (1976-03-01), Johnston, Jr.
patent: 4041532 (1977-08-01), Plows et al.
patent: 4760567 (1988-07-01), Crewe

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