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R-4106.A
MECHANISM
ANO
PRINCIPLE
4.
ER-tube (Erect
image
binooular-tube)
4.
ER·tube (Erect image binocular-tuba)
TIUs
ER-tube provided with a roof-type depression
pnsm,
produces erect images.
• Depression angle: 30°
•
Tube magnification: 1 X
• Special
beam
splitter offers brighter images.
• Owing
to
Siedentopf
type
adopted, even though the interpupillary distance
is
changed between
51
- 75
mm,
for which prism cover
@is
vertically
tumed
and
moved, the tube length keeps
constant
ali the times.
e Optical system in the binocular body following the beam
splitter
prism
is
constructed the sarne
as
for B-tube.
•
As
shown
in Fig. 5, the light rays between
§,
@ and
§.
1
§ are made parallel.
OL
Bcum
.~plil
prism
Fig.
15
-
21
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