The imaging apparatus 5, wherein said scanning direction of said irradiation apparatus of the energy beam is inclined against the rotation axis of said attaching member substantially at {HEAD ~ an angle} corresponding to a ratio of a scanning speed of said scanning means to {TAIL ~ a peripheral speed} of the surface of the imaging medium wound around said attaching member 
The imaging apparatus 5 , wherein said scanning direction of said irradiation apparatus of the energy beam is inclined against the rotation axis of said attaching member substantially at { HEAD ~ an angle } corresponding to a ratio of a scanning speed of said scanning means to { TAIL ~ a peripheral speed } of the surface of the imaging medium wound around said attaching member
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