Leica DMIL Bedienungsanleitung Seite 53

• Use a pen to draw a mark in the centre of the
bright surface.
• Remove the objective in the beam path.
• Rotate the collector adjustment (53.6) until the
lamp filament or the discharge arc is clearly
projected.
• Move the reflection of the lamp filament or
the discharge arc to the side (54 a) by rotating
the adjustment screws on the rear of the lamp
housing (53.2 and 53.4).
• Focus the direct image of the lamp filament or
the discharge arc and adjust it as follows:
Fig. 53 106 z lamp housing
1 Level adjustment of lamp, 2, 4 Level and lateral adjustment
of reflection, 3 Mirror focusing, 5 Lateral adjustment of lamp,
6 Collector (focusing of lamp image), 7 Mounting screw
2
3
4
5 1 6 7
For halogen lamp:
• Move the direct image to a position just below
or above your centre mark (54b) or, especially
for higher objective magnifi-cations such as
with the Xe lamp (54c), to the centre, i. e.
superimposed.
• Move the reflection into the brighter circular
area.
• Align the reflection symmetrically with the
direct image (54c). Alternatively, you may also
superimpose the two images as for the Hg and
Xe lamps.
For mercury (Hg) and xenon lamps (Xe):
• Use the horizontal and vertical adjustment
controls of the holder (53.5 and 53.1) to move
the direct image into the centre of the brighter
circular area.
• Move the reflection into the brighter circular
area.
• Focus the reflection.
• Adjust the mirror until the reflection is super-
imposed to the direct image (54c).
• Remove the paper.
• Position the specimen.
• Check with low objective magnification that
the image is illuminated in a homogeneous
manner.
• Adjust the collector (53.6) if necessary.
Attention!
Be careful not to project the reflection onto
the electrodes as there is a risk of over-
heating leading to explosion. The two
electrodes can just be seen in the extension
of the symmetry plane of the discharge arc.
53