In a laser scanning microscope comprising a deflecting device, which is provided
for variable deflection of a laser beam about a deflection angle, and a control
unit, which controls the deflecting device via a control signal and measures, at
least temporarily, a present deflection angle value, it is envisaged that, at the
time of measurement of the present deflection angle value, a testing structure,
which comprises at least one structural element whose position is assigned to a
predetermined deflection angle value, is arranged downstream of the deflecting
device, a detecting device is provided, which emits a detection signal when the
laser beam is directed to the structural element, and the control unit assigns
the present control signal to the predetermined deflection angle value upon reception
of the detection signal.
