50
Revision 00 EN - 01/2021
HP-MSM-HB
35,0(6
8. Place the alignment tool on the cyclone. The upper edge corresponds to the z-position of the measur-
ing plane of the objective. Turn on the pilot laser. If the laser hits the little bore in the cover vertically, it is
displayed centrally on the sensor.
9. Remove the alignment tool.
10. At the beginning measure the laser at low power and define the measuring range for the caustic mea-
surement. The measuring range typically comprises 2 to 3 Rayleigh lengths above and below the focus-
plane).
11. Carry out a test measurement with the desired z-range and with small power.
12. During the measurement, check the surroundings of the measuring objective for scattered radiation (if
necessary, reduce the misalignment angles in x and y direction to below 10 mrad).
13. Increase the power gradually until the measuring power is reached and carry out a caustic measurement
(it might be necessary to adapt some parameters).
14. After finishing the last measurement, the objective should be covered with the alignment tool if it remains
in place. If the instrument is to be transported, please use the transport lock of the objective lens.
13.3
HP-MSM-HB with Fiber Bridge
NOTICE
Danger of damage due to a collision of the objective with the fiber adapter.
The movement range of the HP-MSM-HB in z-direction is limited by the fiber adapter. The
maximum movement range depends on the type of fiber adapter that is used.
X
Please mind the limit values zmax given in table Tab. 16.1, measured from the surface of the
aperture plate.
z
max
Aperture Plate
Fig. 13.1:
Movement range of the HP-MSM-HB with fiber bridge
Type of Fiber Adapter
Maximum Movement Range z
max
in mm
HP-MSM-HB
HP-MSM-HB 20 kW
QBH
106
26
HLC-16
118
38
LLK-D
120
40
Tab. 13.1: Limit Values z
max
