105
8. Operation
8.13 Aperture and Field Diaphragm
Leica DMI3000 B:
Transmitted light:
• The manual aperture diaphragm is adjusted on
the condenser.
• The manual fi eld diaphragm is adjusted on the
illumination arm.
Incident light:
• The fi eld diaphragm is set via the rotary knob
(5a.11, p. 25). Diaphragm apertures of different
sizes (round or angled) can be selected. (See
the labeling on the rotary knob.)
Round apertures are suitable for observations
through the eyepieces; angled apertures are
suitable for observations with CCD cameras.
Leica DMI4000 B and Leica DMI6000 B:
Both diaphragms have been set to suitable val-
ues for the current objective and contrast meth-
od at the factory.
The aperture diaphragm is controlled manually
when using the manual condenser.
The fi eld diaphragm is controlled manually when
using the manual illumination arm.
• The motorized diaphragms can be adjusted
at any time with the AP (aperture diaphragm)
(118.1) and FD ( fi eld diaphragm) (118.3) function
buttons. The values displayed on the Lei-
caScreen change accordingly.
The function buttons are assigned to the cur-
rently active transmitted light (TL) or incident
light (IL) axis.
Microscopes with structured illumination are not
equipped with a fi eld diaphragm.
Caution:
The old values will be overwritten by the current
ones!
Caution:
When using PH or DF, the aperture diaphragm is
fully open and can not be closed.
Adjust diaphragms via
fi xed function buttons on stand
variable function buttons on stand and
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