Olympus GX41 Manuel d'instructions - Page 24
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9
OPTICAL CHARACTERISTICS
-- The UIS series objectives that are not mentioned below can also be mounted on this microscope. --
The table below shows the optical characteristics of
different eyepiece and objective combinations. Ob-
jective specifications are marked on the objective (as
shown in the diagram on the right).
NOTE
Refer to the latest catalogue or consult Olympus for
the updated information on the eyepieces and objec-
tives that can be combined with this unit.
Objective
Eyepiece
WHB10X
(Field number 20)
WHN10X
(Field number 22)
Working distance: Distance between the surface of a specimen and the tip of the objective.
Aperture number: Essential value to determine the characteristics (resolution, depth of focus and brightness) of an
Resolution:
Depth of focus:
Field number:
Field of view:
20
Type
Magnification
Numerical aperture
Working distance (mm)
Resolution (μm)
Total magnification
Depth of focus (μm)
Field of view (mm)
Total magnification
Depth of focus (μm)
Field of view (mm)
objective:
Increases relative to the aperture number.
Resolution .......................................
Decreases relative to the aperture number.
Depth of focus ...........................
Changes in proportion with the square of the aperture number (the same
Brightness .......................................
magnification comparison).
Represented by the interval between two points on a specimen which determine the ability of an
objective to distinguish two images close to each other.
The degree to which the portions of the image from front to back can be seen in focus simulta-
neously. The lower the aperture iris diaphragm, the greater the depth. The higher the aperture number,
the shallower the depth.
The diameter of the area viewed through an eyepiece represented in millimeters.
The diameter of the area observable on the specimen, expressed in mm.
Magnification
UIS marking
Cover glass thickness
—: May be used with our with-
out a cover glass.
0: Used without a cover glass.
MPLN
5X
10X
20X
0.10
0.25
0.40
20.0
10.6
1.3
3.36
1.34
0.84
50X
100X
200X
98
18
6.1
4
2
1
50X
100X
200X
98
18
6.1
4.4
2.2
1.1
Objective series
(PL = Plan)
NA (Numerical of Aperture)
FN (Field Number)
50X
100X
0.75
0.90
0.38
0.21
0.45
0.37
500X
1000X
1.4
0.73
0.4
0.2
500X
1000X
1.4
0.73
0.44
0.22