Abstract: A method for calibrating and/or adjusting a lidar system. In the method, in order to perform a measurement-based comparison with respect to an underlying one-dimensionally or two-dimensionally detecting detector unit, a distribution of secondary light incident from the field of view and imaged onto the detector unit, and a center position and/or width of the distribution is/are acquired as position data and compared especially with presumed and/or expected position data featuring an expected center position and/or an expected distribution.