Olympus BHTP 200 Manual de instrucciones - Página 13
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C.
U s e
oi
the
OrlenWon
Plata
The
analyzer
III
built
in
the
intermediate
attachment
should
be
adjusted
for
optimum
extinction
by
means
of
the
orientation
plate
provided,
in
the
-
following
steps.
1 .
Bring
the
IOX
objective
into
the
tight
path,
and
make
sure
that
the
red
dots
on
both
intermediate
attachment
and
microscope
stand
are
aligned.
2.
Set
both
polarizer
and
analyzer
at
position
"0"
to
attain the
"crossed
filter"
position.
3. Place the orientation plate on the center of the stage.
4. Looking at the orientation plate through the eyepieces, rotate
the stage
(as you rotate the
stags, the orientation plate
darkens and brightens
alternately) until it most darkens or attains the extinction position; then,
touch up the position of the
orientation plate manually
so
that the lower
edge (fiducial line) of the orientation plate
nears the cross line
{X axis).
5. Disengage
the analyzerm
from the light path; thismakesthe field
of view
bright.
5.
Loosening the observation tube clamping screw
,
rotate the observa-
tion tube slightly until the fiducial tine of the orientation plate is in parallel
with the cross line; then, reclamp
the
observation tube. (Fig.
10)
Orlentation plate
C m s line
7
D .
Centering the Condenrer
I
1.
Bring the objective
10X
into the light path.
I
If a
speclmen
I s
placed on the circular rotatable stage without
a
mechanical
stage
h
Is recommended
that
the peripheries
o f
the
speclmen be
held
with the stage slips pmided.
a
2. Swing in the condenser top lens, and bring the specimen into focus.
3. Stop dpwn the field iris diaphragm
m.
A slightly blurred image of thef ield
diaphragm can naw be seen in the eyepiece. (Fig. 13)
4. Using the condenser knob, adjust the
condenser
height; focus the
image of the field diaphragm onto the already focused specimen.
If
the
swimen sllde k too thick, it is
s o i o m e t l r n w lmposstble to
obtain
a sharply-fecused image.
5. While widening rhe diameter of the field progressively by opening the
field diaphragm
in the base, use the condenser centering screws E l to
bring the field diaphragm image into the center of view. (Fig. 11)
11