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HYPERION User Manual Bruker Optik GmbH
Repair and Maintenance 6
To obtain reliable spectroscopic measurement results, the ATR crystal needs to be
aligned centrically (i.e. alignment in horizontal direction) after the replacement of the
crystal assembly. Also the height setting of the crystal needs to be checked and cor-
rected (i.e. alignment in vertical direction), if necessary. The height of the ATR crystal is
set optimally if the signal intensity is at maximum with the ATR crystal being in the focus
position. A not optimally set crystal height becomes noticeable by a significantly weak
signal intensity.
☞ For information about how to check the signal with the ATR objective, see
section 4.7.3.
For aligning the ATR crystal in horizontal and/or in vertical direction, the ATR objective
needs to be attached at the revolving nosepiece and connected to the microscope.
☞ For information about how to attach the ATR objective to the revolving nosepiece
and how to connect the ATR objective to the microscope, see section 4.12.3.
Step 10
Adjust the crystal assembly in such a
way that the distance between the
inner ring and the out ring is more or
less equal everywhere. To do this,
adjust the two adjusting screws using
the hex wrench.
Note: This adjustment does not yet
ensure an exact center positioning of
the ATR crystal. For aligning the ATR
crystal exactly in the center position,
the ATR crystal needs to be attached
to the microscope. Then, the ATR
crystal needs to be checked for cen-
trality. (See section 6.4.4.) If required,
the ATR crystal needs to be aligned
centrically. (See section 6.4.5.)
Distance between inner and outer ring
Screws for adjusting the crystal assembly
in horizontal direction
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