A multi-curing apparatus includes an actuator, a first chamber including a first energy source head, a second chamber including a second energy source head, a first driver including a first rotation transmission gear gear-engaged with the actuator, and a first driving gear gear-engaged with the first chamber. The apparatus further includes a second driver including a second rotation transmission gear gear-engaged with the actuator, and a second driving gear gear-engaged with the second chamber. The apparatus aligns a position of the first chamber with reference to a position of the second chamber while the first rotation transmission gear, the second rotation transmission gear, and the second driving gear are fixed.

A multi-curing apparatus includes an actuator, a first chamber including a first energy source head, a second chamber including a second energy source head, a first driver including a first rotation transmission gear gear-engaged with the actuator, and a first driving gear gear-engaged with the first chamber. The apparatus further includes a second driver including a second rotation transmission gear gear-engaged with the actuator, and a second driving gear gear-engaged with the second chamber. The apparatus aligns a position of the first chamber with reference to a position of the second chamber while the first rotation transmission gear, the second rotation transmission gear, and the second driving gear are fixed.

A hologram recording and playback device is provided with: a medium rotation unit which rotates a hologram recording medium around a predetermined rotational axis; a movement unit which is capable of moving the position of the medium rotation unit within a plane that is perpendicular to the rotational axis; an orthogonal incident angle modification unit which is capable of modifying an orthogonal incident angle; a medium rotation control unit which controls the medium rotation unit so as to rotate the hologram recording medium; an eccentricity compensation unit which performs positioning control of the movement unit; an orthogonal incident angle control unit which controls the orthogonal incident angle modification unit; and an orthogonal incident angle calculation unit which calculates the orthogonal incident angle.

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.