Information recording carrier and method of reproducing the same

1. An information recording carrier having minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent to each other, comprising:

a supporting body having the minute pattern;

a recording layer formed on the minute pattern formed on the supporting body; and

a light transmission layer formed on the recording layer,

wherein when 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 minute pattern is formed under a relation of P<λ/NA;

wherein the plural grooves or lands include at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation;

wherein a phase of a high frequency portion and a phase of a low frequency portion are continuous at a border between the high frequency portion and the low frequency portion composing the frequency shift modulation; and

wherein a frequency ratio between a first frequency of the high frequency portion and a second frequency of the low frequency portion is 1.5.

2. A method of reproducing the information recording carrier as recited in claim 1 , comprising:

irradiating the laser light on the recording layer through the light transmission layer in such a way that the laser light tracks the grooves or lands there beneath;

detecting the laser light reflected by the recording layer; and recognizing the frequencies that are used in frequency shift modulation through the detected laser light.

3. The reproducing method recited in claim 2 ,

wherein the wavelength of a laser beam λ, is 405 nm, and

wherein the numerical aperture of an objective lens NA is 0.85.