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2)9
By using different front lenses for the sensor head the vibrometer can be opti-
mally adapted to the different ranges of stand-off distance. The standard front
lens
2)90 5
(mid range) is suitable for stand-off distances from 175mm to
over 10m. The ideal front lens for short range
2)965
(short range) has been
optimized for distances from 65mm up to 5m. For long range from 450mm to
over 100m the front lens
2)945
(long range) should be used.
A label on the side of the sensor head shows the front lens model which is fit-
ted.
The components of the front lens mount are shown in figure 5.1.
To exchange the front lens, proceed as follows:
1. Turn the threaded cover
anti-clockwise until it can be removed.
2. Remove the mount
for the
λ
/4-plate and put it to one side.
3. Pull the front lens
out of the lens mount
.
4. Carefully put the new front lens into the lens mount. Turn it in the lens
mount until the pin
slots into place.
5. Put the
λ
/4-mount
in the lens mount in such a way that the pin slots into
place in the slit in the
λ
/4-mount.
6. Turn the threaded cover
on the lens mount until it is securely seated.
7. Exchange the label for the front lens model on the side of the sensor
head.
2)9
Exchange of the mini sensors with fiber heads is described in section B.3.
Figure 5.1: The components of the front lens mount
1 2 3 4 5
&DXWLR Q
Make sure that everything is kept clean and take great care when exchanging the front lens
so that no dirt gets into the housing and the optical components are not damaged!
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