Sony Corporation

Atsushi Umezawa

Minoru Tobita

Shiro Morotomi

Toshiya Murakami

Kunihiro Shioura

A reproduction apparatus for an optical recording medium that has a convex pit recording layer, in which pits are formed in a convex shape viewed from a laser incidence side, and a concave pit recording layer, in which pits are formed in a concave shape viewed from the laser incidence side, as recording layers in which data is recorded by pit strings, the pits being formed with a depth that is set in a range of &#x3bb;/4.5 to &#x3bb;/6 with respect to a laser wavelength &#x3bb;, including: an optical head section that irradiates laser beams on the recording layers and detects reflected light information to read out information recorded in the recording layers; a tracking error signal generating section that generates a tracking signal; a polarity switching section that switches a polarity of the tracking error signal; and a tracking servo section that performs a tracking servo operation.

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Kanagawa, Japan

Atsushi Umezawa