User Guide

3. Functional description
3.1 Beam guideway of the laser light
1 Optical plug of the laser light
cable (LLK-D)
2 End of the laser light cable
3 Plug receptacle
4 Collimation lens
5 Lens
6 Focusing lens
7 Lens protection
8 Focal point
9 Workpiece
Focusing optics D50, schematic diagram Fig. 3-34
In case of a beam guidance through the laser light cable, a con-
ical laser beam comes out of the end of the laser light cable.
The collimation lens converts this beam into a parallel beam.
The focusing lens focuses the laser beam onto the workpiece.
The focal length of the collimation unit f
c
determines the dis-
tance between the fiber end of the laser light cable and the colli-
22-50-17-CRen
2020-01
Functional description
3‐41
Beam guidance
Focal length of collimation