Interpupillary Distance Changes By Ltself; Dirt In The Optical System (Flare, Unclear Lmage Of Dust Or The Llke In The Viewfield) - Nikon Optiphot Repair Manual

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).
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