Mounting Position; Aligning The Msm+ Hb; Important Conditions For The Position Of The Focused Laser Beam - Primes MicroSpotMonitor Plus HighBrilliance Original Instructions Manual

7.2

Mounting position

The MSM+ HB is designed to operate in a horizontal position with a beam incidence from above.
Check the space conditions before mounting. Especially check the required space for the connecting cables
and the traverse range of the z-axis (see chapter 15, „Dimensions", on page 98). The device must be set
up in a stable manner and fastened with screws (see chapter 7.3 on page 28).
NOTICE
Damaging/destroying the device
The camera housing of the device can be moved along the z-axis. Obstacles in the traverse
range of the MSM+ HB can lead to collisions and damage the device.
X Keep the traverse range free of obstacles (cutting nozzle, pressure rolls, etc.).
7.3

Aligning the MSM+ HB

7.3.1

Important conditions for the position of the focused laser beam

Due to the imaging characteristics of the measuring objective it is necessary for the laser beam focus to be
positioned in a certain range above the measuring objective.
NOTICE
Damaging/destroying the device
The focus has to be in a defined range with reference to the measuring objective. In case it
is too close or too distant, the optics might get damaged in case of high beam intensities.
X Use the enclosed alignment tool for the alignment.
The size of the range in which the focus is to be positioned before the first measurement depends on the
divergence of the focused laser beam and the power used. The z-measurement range is between an upper
and a lower limit.
Upper limit
If the focus is too far above the measuring objective, a focus can occur on the image-side beam path.
Together with high beam intensities, this can cause damage to the optics. In addition, the aperture of the
objective can get damaged due to absorbed laser light.
Measuring plane
The power density distribution of the measuring plane is imaged on the CCD sensor.
Lower limit
If the focus is too close to the measuring objective, the beam splitter may be damaged, depending on the
type of focusing and the power used.
Measuring plane distance
The measuring plane distance corresponds to the distance of the measuring plane from the upper edge of
the objective.
With the included alignment aid and a pilot laser beam, you can position the measuring device with the nec-
essary accuracy.
28
MSM+ HB
Revision 00 EN - 02/2022