Olympus JM Руководство по эксплуатации - Страница 11
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@Use of
Heat Absorb
ing Glass
This
t
ube
covers
the
bulb of the brigh
t/da
rk
f
ield illuminat ion, and absorbs heat
emitted
f
rom
the
illuminator
bulb.
I
(
For
incl ined illuminat ion
bulb)
Hu
t Abmbi
nl
Gl.
..
1
Turn
the
focusing handle
of the illuminator
counter-clockwise, and it
will be
easily
released
from
the
illuminator.
Then replace
the
bulb.
(
Fig
.
11
)
10.
Use of Ir
is
Diaphragm
(
slip-in
type)
Turn up the Epi
illum
inator
and put
the iris
diaphragm
on
it
.
If
you
place
a gem on the
diaphragm
and match the adertu re
of
the
diaphragm
to the size
of
the gem
,
switchi
ng on the
illuminator
,
it inst ant ly provides a
simple
met
hod to
examine
the gem.
1m.
OPTICAL
CHARACTERISTICS
...
(
Fig.l
l)
Magnification
Total
Actual
I
Working
Eyepiece
Indicator
Value
Magnifi cati on
Viewfie
id(mm)
j
Distancs
(mm )
0.7
7X
31.4"
88
1
l
OX
22
.0
"
1.5
15X
14.7
"
2
20X
11.0
"
GI0X
2.5
25X
8
.8
"
-
--
3
30X
7.3
u
3.5
35X
6.3
"
4
40X
5.5
u
0
.7
14X
17
.4
88
1
20X
12.2
"
1.5
30X
8.1
"
2
40X
6.1
"
G20
X
2.5
SOX
4.9
u
3
60X
4.1
"
3.5
70X
3.5
"
4
80X
3.1
u
_.
9