Checking Modulation Contrast Slit Diaphragms; Setting The Motorized Polarizer - Leica DMI Series Instructions Manual

7. Start-up
7.8 Checking modulation contrast slit dia-
phragms
If your microscope is prepared for integrated
modulation contrast, its condenser will be
equipped with slit diaphragms suitable for the
objectives.
The slit diaphragms have been centered at the
factory.
Their proper location should be checked, how-
ever.
Note:
Each objective has its own slit diaphragm as-
signed to it in the condenser disk. The test must
therefore be performed for each objective.
Open the cover at the top right side of the con-
denser. The various
numbered openings for the inserts are now vis-
ible. Ensure that all of the slit diaphragms are
fi rmly seated and that none of the retaining
screws are loose. If a part has loosened, please
see Chapter 6.5 Installation of Condensers.
78

7.9 Setting the Motorized Polarizer

Remove your specimen from the stage.
Leica DMI3000 B:
• Set the condenser to the bright fi eld position.
• Insert the analyzer into the analyzer slot on
right side of the stand.
• Activate the polarizer.
• Turn the polarizer until you have the optimal
dark position.
Leica DMI4000 B and Leica DMI6000 B:
For manual condensers, proceed as described
above for the DMI3000 B.
• Select the POL method (one of the variable
function buttons on the stand). If the analyzer
is present on the Fluo turret as an analyzer
block, it will move into position automatically. A
manual analyzer must be positioned by hand.
In the case of motorized condensers with mo-
torized polarizers, the polarizer will move into
position automatically.
• Insert the centering key in the opening provid-
ed on the condenser (Fig. 96).
• Set up optimal darkening. (The analyzer must
be in place.)
• Remove the centering keys.
Replace your specimen on the stage.