Calibration system

Abstract

The invention relates to a calibration method for calibrating a position of at least two spots illuminating a performance environment with radiation, comprising: selecting a calibration location inside the performance environment; emitting a spot identifier from each of the at least two spots; receiving the emitted spot identifiers at the calibration location; determining a variable per spot using the received spot identifiers; and calculating the position of the at least two spots based on the respective variables. Figure 3