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COMMON SETTINGS FOR TRANSMITTED AND INCIDENT LIGHT
4.1 Adjust the observation head
Loosen the lock-screw, turn the observation head to a comfortable position for observation,
and then lock the lock-screw.
4.2 Place the specimen on the stage
Fix the specimen slide on the mechanical stage using the slide-clamp. Ensure that the
specimen is centered over the stage opening.
4.3 Lamp settings
In order to activate the transmitted light illuminator, insert the plug of the mains cable into
the socket and turn on the switch on the back of the main body. Turn the brightness adjust-
ment knob to a brightness suitable for observation.
4.4 Preliminary settings
Before trying to focus the sample, ensure that:
The eld diaphragm is fully open.
The aperture diaphragm is fully open.
No lter is inserted under the observation head.
The analyzer lter is in OUT position (lever fully pulled out).
Photo port closed (lever fully in).
Bertrand lens in OUT position (you read “0” on the Bertrand lens disc under the observation
head). Swing out lens of the condenser in OUT position (if you use the 4X objective).
4.5 Adjust interpupillary distance
Hold the right and left parts of the observation head using both hands and adjust the interpu-
pillary distance by turning the two parts until one circle of light can be seen.
4.6 Focus and diopter adjustment
Loosen the focus-stop knob, rotate the coarse focusing knob to bring the slide into focus with
a 4X or 10X objective. Adjust the ne focusing knob to get the image sharp and clear while
observing with your right eye, then turn the left diopter ring to a sharp and clear image also
with the other eye. Turn the tension-adjust-knob to get a suitable tension for the focus system.
4.7 Align the system
Transmitted light: Insert the swing out lens of the condenser and fully close the eld dia-
phragm. Rotate the condenser adjustment knob until you see a sharp image of the closed
eld diaphragm (a bright spot of light). Act on the condenser centering screws until you move
the bright spot in the center of the image eld. Then re-open the eld diaphragm.
Incident light: Completely close the eld diaphragm and act on its centering screws in order
to put the bright circle in the eld center. Then open the eld diaphragm and close the aper-
ture diaphragm: act on its centering screws in order to have a centered distribution of light in
the eld (no signicant vignetting should be noticed along the eld edge).
4.0 USING THE MICROSCOPE
