Centering The Condenser Lens - Nikon OPTIPHOT-POL Instructions Manual

3) Rotate the stage about
1800,
and the target
is displaced from the center of the cross
lines. Move the objective using the center-
ing tools so that the center of the cross
Iines comes to one half position of the
displacement of the target. (F ig. 15)
Rotate
1800
Target-
A half
position
of the
displacement
Image of field
[~:a~~~~~~
~'\
)
,,>J
":/
Eyepiece
viewfield stop
Fig. 16
Fig. 15
• Repeat the above procedure two or three
times, and the rotation center of the stage
coincides with the cross Iines center .
• Carry out centering for each objective.
6. Centering the Condenser Lens
1) Close the field diaphragm in the micro-
scope base to its smallest size by means of
the field diaphragm control ring. Rotate
the condenser focus knob to move the
condenser vertically so that a sharp image
of the field diaphragm is formed on the
specimen surface.
2) Bring the field diaphragm image to the
center of the field of view by means of
the condenser centering screws.
(Fig.
16-1IJ)
3) Change over to the objective 40 x, and
adjust the field diaphragm so that the
image of the diaphragm is about the same
as the eyepiece viewfield stop, as shown in
Fig.
16-~.
If not centered, use the con-
denser centering screws again.