Information recording carrier and information reproducing apparatus for the same

An information recording carrier having minute pattern including plural grooves formed to be substantially in parallel and adjacent 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 the minute pattern is formed under a relation of P<λ, /NA, where P represents a distance between centers of adjacent grooves, λ, represents a wavelength of a laser beam between 350 nm and 450 nm, and NA represents a numerical aperture of an objective lens between 0.85 and 0.9,
• wherein the plural grooves include at least a wobbling region,
• wherein said wobbling region records, as wobble, data modulated by phase shift modulation,
• wherein the thickness of light transmission layer is from 0.02 to 0.12 mm,
• wherein said recording layer is subject to the laser beam having passed said light transmission layer, and
• wherein the data modulated by phase shift modulation show information concerning a size of the information recording carrier.