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R-4106.A
REPAIR ANO
ADJUSTMENT
5. lnterµupillary Distance
Chlln<JtiS
by ltsetf
6. Dirt
in
ttte Optical System (Fiam, Unctear lmage
of
Dust
or
ttte Like in
the
Viewfield)
5.
lnterpupillary
Distance Changes
by
ltself
Cause:
(!)
Breakage, deformat1on
or
wear
of wave-formed washer @C@)).
(2) Loosening of torque adjusting
screw
@e@).
< Repair
and
Adjustment
>
ln the
case
of (1) ......
Refer
to
4.
Not
smooth operation of interpupillary distance adjustment,
cause
(2
).
ln
the
case
of
(2)
...... Fasten positively the torque adjusting
screw
@
C@).so
that
the
torque
is
1.5
- 2
Kg
(Fig. 18).
Note:
Procedure
Ali
the tubes
ot
X
and
Y microscopes being
ot
Siedentopt type. where the tightness
of interpup1llary distance adjustrnent
is
determmed
by
bending of wave-fonned
washer
@U§)), the tightness
is
adjustable
by
fastening
'®
t@).
1)
Remove
central
axle
cap
@ C@).
Since
the screw
is
attached with
No.
350,
use
alcohol for
remova!.
2) Fasten the torque adjusting
screw
@
(@)to
make
the torque l
.5
- 2
Kg.
3) Attach central axle
cap
@
C@).
4) Finally,
see
that
the
interpupillary distance does not change
by
itself.
6. Dirt in
the
Optical System (Flare, Unclear lmage
of
Dust
or
the
Like in
the
Viewfietd)
Cause:
(1) Finger marks,
oil
or
the
like
on the light incidence surface
of
p~sm
@
Cê
and
@).
(2)
Large
dust on the surfaces
of
prisms @ and @ or prism
@.
< Repair
and
Adjustment
>
ln the
case
of
(1)
......
Wipe
lightly
using
a cloth
or
lens
tissue $0aked with a triíle
of
absolute
alcohol (ethanol
or
rnethanol).
-
37
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