Olympus bx40 Інструкція з експлуатації - Сторінка 21
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Fig. 33
0
0
Fig. 34
1. Turn the condenser height adjustment knob 0 to raise the condenser
to its upper limit. (Fig. 33)
2. Focus on the specimen using the IOX objective.
* When using the U-SC Swing-out
condenser,
move the top lens
into the light path.
3. Rotate the field iris diaphragm ring @ in the direction of the arrow to
where the diameter of the diaphragm is near its smallest.
4. Manipulate
the condenser
height adjustment
knob @ until the iris
diaphragm image is Seen in sharp focus within the field of view.
5. Turn the two condenser centering screws @ to move the iris diaphragm
image to the Center of the field of view.
6. Gradually open the field iris diaphragm. The condenser is properly centered
if the iris image is centered and inscribed in the field of view.
7. During actual use, open the field diaphragm slightly until its image
circumscribes the field of view.
5
0
Field Iris Diaphragm
1
2
The field iris diaphragm restricts the diameter of the beam of light entering
the objective
and thus excludes extraneous
light, improving
image
contrast. The diameter of the field iris should be adjusted for objective
2
0
power to the extent that it just circumscribes the field of view. (See
L
"Compatibility
of Objectives and Condensers"
on the next Page.1