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7.5 Adjusting the Light Sources
Centering is only required when using the 106 z
lamp housing.
• When a supply unit is used, it is turned on first.
Caution!
Never look directly into the beam path!
Caution!
Light sources pose a potential irradiation
risk (glare, UV-radiation, IR-radiation).
For the 106 z lamp housing, the direct arc image
(for gas discharge lamps) and its mirror image are
focused separately and adjusted to each other.
• Move the filter system or reflector into the
light path.
• Open the shutter and remove any diffusing
screens* from the light path.
• Put a piece of paper on the specimen stage
and roughly focus the surface with a dry ob-
jective of low to medium magnification.
• Set the field and aperture diaphragms roughly
at the center position.
• With a felt tip or ballpoint pen, make a
marking at any position on the paper and slide
it into the small illuminated field.
• Turn a vacant nosepiece position into the light
path or remove the objective.
The light source will then be imaged onto the
paper. While observing the light source, the
lamp is adjusted as follows.
Fig. 41
106 z lamp housing
1
Lamp height adjustment
2,4 Mirror image height and side adjustment
3
Focusing the reflector
5
Lamp side adjustment
6
Collector (focusing of the lamp image)
5
2
3
4
7. Start-up
1
6
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