Olympus BHS-313 Manuale di istruzioni - Pagina 18
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VI.
OPTICAL
DATA
bjective
Type
D Plan
Ach.
S Plan
Ach.
Magnifi-
+
ㆍ
catión:
4x | 10X | 20X | 40X
|100X*|
4x |
10X | 20X | 40X
|100X
Ν.Α.
0.10 |
0.25 | 0.40 | 0.65 |
1.25 |
0.13|
0.30 | 0.46 | 0.70 |
1.25
W.D.(mm)|
7.03 |
7.4
0.83 |
0.23 |
0.17 |
15.5
7.5
1.5
0.5
0.17
Focal length
(mm)
Resolving
Eyepiece \| power (11)
3.36
1.34 | 0.84 |
0.52 |
0.27
2.58
1.12 |
0.73 | 0.48 |
0.27
Total mag. |
40X | 100X | 200X | 400X | 1000X|
40X |
100X | 200X | 400X | 1000X
34.23 | 17.7
8.99 |
4.67
1.75 | 35.99 | 18.98 | 8.03 |
4.13 |
1.69
WHK
10X
(Field
Focal
Field
Lama
[173 | 276 | 945 | 30 | 068 [1254
221 | 76 | 272 | 068
2)
시
5
2
| 1
05 | 02 | 5
2 :
l a
05 | 0.2
*Immersion objectives
The resolving power and focal depth are obtained with fully opened aperture diaphragm.
Technical terms:
© Working distance:
The distance from the cover glass to the nearest point of the
objective.
© Numerical aperture:
The N.A. represents a performance number which can be com-
pared to the relative aperture (f-number) of a camera lens. The
N.A.
values
can
be used
for directly comparing
the resolving
powers of all types of objectives. The larger the N.A., the higher
resolving power.
©
Resolving power:
The ability of a lens to register small details. The resolving power
of a lens is measured by its ability to separate two points.
©
Focal depth:
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 diaphragm, the focal depth becomes
larger.
The
larger the N.A. of an objective the shallower the focal depth.
©
Field number:
A number that represents the diameter in mm of the image of
the field diaphragm
that is formed by the lens in front of it.
©
Field of view diameter:
The actual size of the field of view in mm on the object surface.