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8.5 Condenser [PA53MET-T, PA53MET-BD-T]
8.5.1 Centering the Condenser
●
Turn the condenser height adjustment knob
to raise the condenser to its upper limit.
●
Focus on the specimen using the 10x objectives.
●
Rotate the field iris diaphragm ring
in the direction of the clockwise so that the diaphragm image
comes inside the field of view.
●
Manipulate the condenser height adjustment knob
to focus on the diaphragm image.
●
Turn the two condenser centering knob
to move the iris diaphragm image to the center of the
field of view.
●
Gradually open the field iris diaphragm. The condenser is properly centered if the iris image is
centered and inscribed in the field of view.
●
During actual use, open the field diaphragm slightly until its image circumscribes the field of view.
NOTE
The field iris diaphragm restricts the diameter of the beam of light entering the objectives and thus
excludes extraneous light, improving image contrast. The diameter of the field iris should be adjusted for
objective power to the extent that it just circumscribes the field of view.
Fig. 13
Fig. 14
Summary of Contents for PA53MET
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