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V. GETTING READY FOR OBSERVATION
a)
PROCEDURE TO SET UP THE MICROSCOPE FOR KOEHLER ILLUMINATION
1.
Switch on the microscope through the switching button placed on the base of microscope,
check that light reaches correctly the objectives.
2.
Select objective 10X.
3.
Completely open the diaphragm (A) of the illuminator and the diaphragm of the condenser
(B).
4.
If the condenser is equipped with the additional lens (swing lens) or if a round filter (diffusion
filter) is placed in the filter seat of the condenser, rotate this out and take care that the
swing lens or the filter seat with filter is completely removed from the optical path.
5.
Take a specimen and place it on the specimen stage.
6.
Watching in the eyepieces, use the focusing knobs (D) to move the specimen stage up and
down until you obtain a clear image of the specimen. It may happen that the final image is
not perfect since the optimization process isn’t finished yet.
E
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