Olympus BHTP Series Manuale di istruzioni - Pagina 18
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4. Insert the quarter plateeor sensitive tint
plate*
into the slot, closest to you
at your right hand side in the intermediate polarizing tube.
To disengage the test plate, you can just pull
it
back
to
its
ctick
stop
position
(wt
poMion).
*A Berek
compnsator
is optionally avallabk
to
measure the
Mrefrjngence of a r-lmen.
A
quarbr wwre
plate
and a ~ t t l v e
tint plat# are also oplionally
awaitable.
sensitive
ti$
plate
i
(optional)
1. Swing the
top lens of the condenser (N.A. 0 . 9 1 , and illuminate
the
specimen; there is no need to use immersion oil between the condenser
and the specimen slide.
2. Bring the
specimen
into
focus, rotate the Bertrand lens
turret
ring into the
1 N position.
Qusrter
wave plate
(optional)
3.
Focus
on
the
interference
figure
formed
at
the
back
focal
plane
of
the
objective
from
20X
to
100X
(It
is
better to
stop
down
the field
iris
di-
4
aphragm
in
case
of
very
small
objects.)
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
by
t
-
r
turning
it
to
the
OUT
position.
1 . Photomicrographic equipment. Photomicrography
with the Model BHTP
requires photomicrographic equipment such as the photomicrographic
system camera.
exposure
meter, photo eyepiece, etc. Read the instruc-
tion
manualsfor each
equipment.
2 .
Photo eyepieces NFK3.3X and NFKSX are recommended for
orthoscopic photomicrography, and NFK2.5X for conoscopic pho-
tomicrography.
3. Image magnification is obtained from the equation below: Objective
magnification X NFK photo eyepiece magnification, = Total rnagnifica-
tion on 35mm film.