The invention relates to spectrometer optics comprising a beam path from a radiation source to a number of electro-optical sensors without local resolution, the beam path having an entry slot (7), a dispersive element (8) and a number of exit slots (9) that are positioned on a focal curve. In addition, said optics are provided with a first actuator for modifying the angle of incidence e (23) between the beam from the entry slot to the dispersive element and from the normal (13) to the dispersive element, a number of second actuators for displacing the exit slots tangentially to the focal curve (6) or in a peripheral direction along the focal curve (6) and a controller, which is designed to control the first actuator and the second actuators in order to carry out a calibration.