Olympus IX71 - Manual (Page 32)

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With the U-UCD8 Universal Condenser (Fig. 41)
# For operation of the U-UCD8, refer to the instruction manual provided
with it.
Since this condenser is used upside down, it may drop when the
optical element is subject to a shock. Be careful particularly when
flipping up the condenser holder.
1. Rotate the condenser height fine adjustment knob @ counterclockwise
to loosen it, then push the knob all the way toward the rear.
2. Rotate the condenser height adjustment knob ² in the direction of the
arrow to lower the condenser to the its lowest position.
3. Rotate the turret ³ to select the “BF” brightfield observation (with no op-
tical element engaged in the light path).
4. Slide the aperture iris diaphragm lever | to open the diaphragm.
5. Slide the field iris diaphragm lever ƒ to the fully open position ( =).
6. Engage the 10X objective and bring the specimen into focus.
7. Using the field iris diaphragm lever, stop down the field iris diaphragm
until its image is just inside the field of view.
8. Slowly slide the condenser height fine adjustment knob @ toward the
front to bring the field iris diaphragm image into focus. When focusing is
obtained, rotate the knob clockwise to clamp it.
9. While gradually opening the field iris diaphragm, rotate the condenser
holder’s condenser centering knobs … to adjust so that the field iris
diaphragm image is centered in the field of view of the eyepieces.
Fig. 41
@
²
³
|
ƒ
…
10. To check centration, open the field iris diaphragm until its image until its
image inscribed the field of view. Now the condenser is centered.
}In actual observation, open the field iris diaphragm until its image
circumscribes the field of view.
}When replacing the specimen or applying oil, use the condenser height
adjustment knob to first raise the condenser and then loser it to its low-
est position. If this is done, it should be unnecessary to adjust the con-
denser centration and focusing again.