Recording apparatus and control method

A recording apparatus for performing information recording using formation of marks by focusing a first light with an objective lens at a given position in a recording layer included in an optical disc recording medium, the recording apparatus comprising:

• a rotation driving unit for rotating the optical disc recording medium;
• a focus servo control unit for condensing a second light which is different from the first light via the objective lens on a reflection film provided with a position guiding element in the optical disc recording medium, and for controlling a position of the objective lens so that the second light is focused on the reflection film on the basis of the reflected light of the second light condensed on the reflection film;
• a recording position setting unit for setting an information recording position of the first light in a focus direction by changing a collimation of the first light incident on the objective lens;
• a tracking servo control unit for controlling a position of the objective lens to allow a focal position of the second light to follow the position guiding element on the basis of the reflected light of the second light;
• an eccentricity amount estimating unit for estimating an eccentricity amount of the optical disc recording medium;
• and
• an eccentricity estimation amount acquisition control unit for acquiring an eccentricity estimation amount for each rotation angle within one revolution of the disc by rotating the optical disc recording medium and performing an operation of estimating the eccentricity amount using the eccentricity amount estimating unit.