Information recording carrier and method of reproducing the...

Details Information recording carrier and method of reproducing the... Information recording carrier and method of reproducing the...

2011-01-25

2011-01-25

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S047400

Reexamination Certificate

active

07876669

ABSTRACT:
An information recording carrier according to one embodiment has minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent each other and comprises a supporting body having the minute pattern, a recording layer formed on the minute pattern formed on the supporting layer and a light transmission layer formed on the recording layer. The minute pattern is formed under a relation of P<λ/NA, where a pitch of each groove or land is P, a wavelength of a laser beam is λ and a numerical aperture of an objective lens is NA. The plural grooves or lands have at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation. A phase relation between a high frequency portion and a low frequency portion composing the frequency shift modulation is ±(π/20.5) to ±(π/0.75). The data is also recorded wobblingly in the wobbling region by bi-phase modulation.

REFERENCES:
patent: 7639594 (2009-12-01), Kondo
patent: 1 115 109 (2001-07-01), None

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