Recording/reproducing apparatus and recording medium

摘要

This recording/reproducing apparatus that records or reproduces information by radiating light to a recording medium is provided with: a medium rotating unit that rotates the recording medium; a moving unit having a movable unit that is capable of moving within a predetermined plane; a rotation angle detecting unit that detects a rotating angle of the recording medium using an angle detection mark that is provided on the recording medium; a position detecting unit that detects a position of the recording medium using an eccentricity detection mark that is provided on the recording medium; and a member for fixing the rotation angle detecting unit and the position detecting unit. With respect to the member, the movable unit relatively moves within a plane substantially parallel to the recording surface of the recording medium, and the medium rotating unit is fixed to the movable unit.

主权项

1. A recording/reproducing apparatus for recording or reproducing information by irradiating light onto a recording medium, comprising:
a medium rotation unit for rotating the recording medium; a displacement stage having a movable portion that moves along at least two driving axes in a predetermined plane, and the medium rotation unit is fixed onto the movable portion; a rotational-angle detection unit for detecting a rotational angle of the recording medium by using an angle-detection-dedicated mark disposed on the recording medium; a position detection unit for detecting a position of the recording medium by detecting an edge of an inner-circumference side or an outer-circumference side of an eccentricity-detection-dedicated mark provided on the recording medium; and a transportation unit on which the displacement stage, the rotational-angle detection unit and the position detection unit are fixed, wherein the movable portion moves in the predetermined plane relative to the transportation unit, and the predetermined plane is substantially parallel to a recording surface of the recording medium.