Olympus CHA-P Manuale di istruzioni - Pagina 14
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4) Insert
the
quarter
wave
plate
or sensitive
tint plate
into the slot in the intermediate
polarizing tube.
*
A Berek compensator is optionally available to measure the birefringence of a specimen.
Sensitive tint plate
Quarter wave plate
Berek compensator
9. Conoscopic
Observation
1) Swing
in the top
lens of the condenser,
and
illuminate
the specimen
with no need to
immerse between the condenser and specimen slide.
2) Bring the specimen
into focus, rotate the Bertrand
lens turret ring into the IN position.
3) Focus
on
the interference
figure
formed
at the back focal plane of the objective from
20X to 100X.
The
pinhole
cap
provided
may
be used
in place of the eyepiece
to directly view
the
interference
figure mentioned
above.
In this case, the Bertrand
lens is disengaged.
11