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,,-·
R-4106.A
ADJUSTMENT
1.
Depression Prism Unit
2)
If,
in
this case, such a center displacement cannot
be
corrected
by
moving
the
lens
chamber
G), make adjustment of
prism
'B
,
as
below:
a)
For lateral adjustment,
place
a
piece
of
silver
foil
(0.1
mm
thick) undemeath,
as
shown
in
Fig.
31, to
cause
a movement corresponding to 5
scale
Unes.
b) For vertical adjustment,
move
prism
@ along the
wall
of
prism
mount
(D,
as
shown
in
Fig.
31.
Fig.
31
(F·tube)
1)
Moving
lens chamber ® (with
@)
and
·'.§
inside),
make
the displacement within a
range
of 2
scale
Unes
in
the Kellner eyepiece.
2) If the center displacement cannot
be
corrected
by
moving chamber
®·
make
adjustment
of
prism @ ,
as
below:
P1ace
a piece
of
silver
foil
(0.1
mm
thick) underneath,
as
shown
in
Fig.
32,
to
cause
a movement
corresponding to 5 lines.
-41-
Silvcr foil
Eycpicce saile
A
B
The center displacement
direction of the test plate
by
a piece of illver
foil
(A,
B)
Fig.
32