EXI-600 INVERTED MICROSCOPE SERIES
ACCU-SCOPE
®
73 Mall Drive, Commack, NY 11725 • 631-864-1000 • www.accu-scope.com
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While looking through the
eyepieces, slowly turn the
centering screws to move the
bright ring to be aligned with the
dark ring.
Return the black knob on the
observation tube to the normal
viewing position .
6.1.6.
Differential Interference Contrast (DIC): Component adjustment
Aligning and optimizing DIC components
For optimal performance, the polarizer and analyzer must be properly aligned. The DIC prisms are fixed
and cannot be adjusted.
The DIC condenser polarizers are combined with the DIC condenser prisms.
BEFORE proceeding with DIC setup, perform K
ö
hler illumination per section 6.1.4 above.
Rotate the condenser turret to the
DIC or DIC II position.
Select an objective with DIC prism
that corresponds to the DIC
condenser prism selected above
(i.e., 10X with DIC, 20X or 40X
with DIC II).
Temporarily, remove the DIC
nosepiece prism.
Focus on a specimen.
Engage/insert the analyzer fully.
Loosen slightly the thumbscrew on
the analyzer gauge.
While looking through the
eyepieces, rotate the gauge on the
analyzer (wheel) until the image is
black or as “black” as possible.
This position indicates “maximum
extinction” when the polarizer (in
the DIC condenser prism) and the
analyzer are oriented at 90
°
to
each other.
Gently tighten the thumb screw on
the analyzer gauge to hold the
extinction position.
Replace the DIC nosepiece prism.
