By dividing at least the part of the correction optics of at least one row
of emitter elements, i.e. the part acting as the fast axis collimator,
into several segments, the degradation of beam quality at the focus,
especially the widening of the focus, which is caused by the
nonconformities between the diode laser bars, or between the row of
emitter elements, and the correction optics, can be effectively prevented.
