Nikon LABOPHOT-POL Gebruiksaanwijzing - Pagina 20

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1. Optical
Fa
ilu
res
Causes
Ac
Darkness
at
t
he
•
Opt
ical
pat
h in
tr
ino
cu
lar
tube
•
Chang
in
g-over
pe
riphery
or
not
fu
lly
chang
ed-over
(R
efer
to
P.
81
uneven
bright­
•
Centering
no
sepi
ece
not in click-
Revo
lve
it
to
c
ness of view­
stOP
positio
n
(Objective
not
field
centered
in
opt
ica
l
path)
(No
a
ppearan
ce
•
Co
nde
nser
not
centered
Centering
by
u
of viewfield)
d iaphragm (R
•
Field diaph
ragm t oo
much
closed
Op
e
n it
pr
o
pe
•
D
irt or
dust on
the lens
-
Cleaning
(C
onden ser
. object ive, eyepiece
,
slide
)
•
I
rnprop
er use
of cond8nser
•
Co
rrect use (R
•
Bertrand lens in
the
optical path
Fli
p out
(Refe
•
Pin ho
le in
the op tica
l
path
Swing out
(Re
(i
n
mon
ocu
lar
ey epiece
tube "AP")
•
Top lens
o
f condenser incorrect ly
Swing
in
to
t
h
positioned
•
1/4
A
&
tint
plate,
com
pensat or
Cor
rect
sett
ing
or
quartz
wedge
inco
rrectly
positi
oned
Dirt
or
dust in
•
Dirt
or
dust
on
t he
lens
Cleaning
the viewfield
(Condense
r
,
objective,
ey
epiece,
f ield
lensl
•
Dirt
or
dust
on
the
slide
Clea
ning
•
To
o
low
positi
on of
condenser
Correct
positi
(Refer to
P.
91
No
good
image
•
No
covergl ass
attached
to
sl ide
Correct
use (
R
obt
ained (l
o
w
or
NeG
obj
ect
ive used w
it
h
covergl
ass
resolution or
•
T
oo thick
or thin
coverg
lass
Use
sp
ecified
contrast)
coverglass
(R
e
• Im mersion
oil soils the top of
dr
y
Cleaning
system objecti
ve
(especially
40
x
I
•
Dirt
or
dust
on
the lens
(con
dense
r
,
Cleaning
objective. eyepiece.
slide)
•
No immersion
oil
used
on
immersion
­
-
-.
Usc
im
rn
ersion
system
objective
(Refer to P.
1
•
Ai
r
bubb les
in imm
ers
ion oil
Remove bubb
•
Not speci fied immer
sion
o
il
used
·
Use
Niko
n
im
•
Co
nden
ser
aperture o
r
field
Open properly
diaph
ra
gm
t oo
much opened
•
Dirt
or dust
on the
entrance
lens
....
Cleani
ng