23
Chapter 4.Function intoduction A16.1098
4.7 Reflection field aperture and
color filter
（
Figure 23
）
When the transmitted light is
illuminated, the dial rotates to adjust
the size of the field aperture, as
shown in the figure.
The lifting hand wheel of the
condenser rotates to realize the up
and down movement of the
condenser and set the observation
height.
The condenser is fixed with fixing
screws.
The two focusing screws of the
condenser are rotated respectively
to move the condenser to the center
of the optical path.
The filter bracket can place different
color filters.
Figure 23
Clamping screw
Filter bracket
Condenser centering screw
Control knob for
visual field diaphragm
adjustment
Thumbwheel for illuminated-field diaphragm
