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7
OPTICAL DATA
I
•
D Achromat
I
Objective
T •tpe
0 Achromat
Magnifiction
4X
JOX
40X
100X"
N.A.
0.10
0 .25
0.65
1.30
Vl/.0.
{mm)
18.2'3
7.18
0.63
0.20
- -
1---
Focal length (mm)
30.03
1690
4.58
1
66
Resolving
p ow er
(,u) • •
3A
1.3
0.52
0
.26
Eyepiece
Remarks
Spr
ing.foaded
-
,_
Total
magn;ficat
ion
40X
lOO X
400X
lOOOX
CWHK10X
Foca
l
depth
(,u)
172.5
27.60
3.03
0.66
(Field number 18)
-
Field
of
view (rnm)
4.5
1.8
0.45
0.18
•
E D Achromat
Objective
Type
E 0 A chromat
Magn
if
icat
ion
4X
10X
40X
100X"
N.A.
0.10
0.25
0 ,65
1.25
W.O.
(mm)
29.00
6.30
0.53
0 .20
Focal length (mm)
31.05
16.45
4.59
1.90
R e~,olvin
g
p01<ver
{,u)
•
•
3.4
1.3
0 .52
0.26
Eyepiece
Remarks
Spring-loaded
Total magnification
40X
100X
400X
100<..
/ X
CWH K10X
Focal
depth (,u)
172.5
27.60
3.03
0.67
(Field number 18)
Field
of view (m
m
)
4.5
1.8
0.45
0.18
"Immersion
objectives
""The
resolving
power is
obtained
v-tith tile fully
opened aperture
diaphragm
.
Glossary
.
Working distance:
Numerical aperture:
Resolving power:
Focal depth:
Fiel
d number:
The
distance
from the
specimen or covEr
glass to the
neares
t point
of
the
objec-
tive.
The
N.A.
represents
a
performance
number which could
be
compared
to
the
relative
aperture
(f-number)
of a camera
lens.
The
quantity of light which the
objective receives
from
the object
in creases with the
square of
the performance
number.
The resolving power
of
a.
lens is measured by
its
abi
lity
to
separate
tvvo points.
The distance between the upper
and
lower limits
of
sharpness
in
the
image
formed
by
an
optical system.
As you
stop
down the
aperture
iris d
ia
phragm,
the focal depth beoomes
deeper.
The
larger
the N .A.
of
the
objective
the
shallower
the
focal
depth
.
A number that represents the diameter in
mm of
the image
of the
field dia-
phragm that is formed by lens
in
fron 1 of it.
Field
-o
f-vie-N diameter
:
The
actual size of
the fi eld
of vie>.N
in mm.
Total magnification
.
Equals
the object ive
magnification multiplied by
the
eyepiece
ma;Jnificati
o
n.
--------------------------------------------------------·
El
0
"'0
-l
(')
)>
r
~
)>
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