Optical recording medium, stamper for producing optical...

Details Optical recording medium, stamper for producing optical... Optical recording medium, stamper for producing optical...

2007-06-26

2007-06-26

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S277000

Reexamination Certificate

active

10508089

ABSTRACT:
On a magneto-optical disk, a first groove Gv1, a second groove Gv2, and a third groove Gv3are formed so as to be adjacently arranged. The first groove Gv1and the second groove Gv2are deep grooves, and the third groove Gv3is a shallow groove. The first groove Gv1and the second groove Gv2are formed by being wobbled. Data is recorded on four recording tracks of the two deep grooves and two lands between the deep grooves and the shallow groove. A CTS signal is obtained by a sum signal (A+B+C+D) of a photo-detector6, and a push-pull signal is obtained by a difference signal (A+D)−(B+C) of a photo-detector8.

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