Olympus IX81 User Manual download pdf (Page 29)

IX81

Fig. 31

With the U-UCD8 Universal Condenser (Fig. 31)

#For operation of the U-UCD8, refer to the instruction manual

provided with it.

This condenser is used upside down, so the optical elements may

fall off if shock is applied. Use caution particularly when flipping

up the condenser holder.

1. Rotate the condenser height fine adjustment knob 1 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 which

no optical element is engaged in the light path).

4. Move the aperture iris diaphragm lever 4 to open the diaphragm.

5. Move the field iris diaphragm lever 5 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 move the condenser height fine adjustment knob 1 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 6 to adjust so that the field iris

diaphragm image is centered in the field of view of the eyepieces.

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 cir-

cumscribes the field of view.

}When replacing the specimen or spreading immersion oil, use the

condenser height adjustment knob to raise the condenser first. After

finishing the procedure, lower the condenser to its lowest position. If

this is done, it should be unnecessary to adjust the condenser

centration and focusing again.

10.

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Olympus IX81 User Manual Page 29