Lithographic apparatus using an array of individually controllable elements in which a fraction of the intensity of the beam of radiation patterned by the array of individually controllable elements is diverted to an image sensor for verifying the quality of the image generated. The rotor is formed by at least one rotor disk divided into two parts, comprising two adjacent rotor halves, which are joined to one another in a radially inner annular region, oriented toward the axle or shaft, and are disposed in a radially outer annular section, with axial clearance from one another. The card-writing device writes the coupon data onto a portable customer card approximately the size of a credit card.