User Guide

Long focal lengths of lens show the following advantages com-
pared with short focal lengths of lens:
■
Larger working distance. By this, less soiling of the lens pro-
tection as usually. The power density on the processing
point will drop with increasing soiling. This diminishes the
processing quality.
■
The depth of focus is longer. This allows a larger working
distance range without changed machining results.
The processing task, the selected components and thus the
beam guideway of the laser light determine the working distance
between focusing optics and the workpiece.
As a result of the given focal diameter and depth of focus, the
working distance must be maintained, if high-quality results are
to be achieved.
Best processing results are achieved
■
with a focusing optics tuned to the processing task at hand.
■
with a correctly adjusted working distance.
■
with clean optical components
■
with workpieces which are clean at the processing point.
22-50-17-CRen
2020-01
Functional description
3‐45