20
9
Objective
Type
MPLN
Eyepiece
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
objective:
Resolution .......................................
Depth of focus ...........................
Brightness .......................................
Increases relative to the aperture number.
Decreases relative to the aperture number.
Changes in proportion with the square of the aperture number (the same
magnification comparison).
Resolution:
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.
Depth of focus:
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.
Field number:
The diameter of the area viewed through an eyepiece represented in millimeters.
OPTICAL CHARACTERISTICS
Magnification
5X
10X
20X
50X
100X
Numerical aperture
0.10
0.25
0.40
0.75
0.90
Working distance (mm)
20.0
10.6
1.3
0.38
0.21
Resolution (μm)
3.36
1.34
0.84
0.45
0.37
WHB10X
(Field number 20)
Total magnification
50X
100X
200X
500X
1000X
Depth of focus (μm)
98
18
6.1
1.4
0.73
Field of view (mm)
4
2
1
0.4
0.2
WHN10X
(Field number 22)
Total magnification
50X
100X
200X
500X
1000X
Depth of focus (μm)
98
18
6.1
1.4
0.73
Field of view (mm)
4.4
2.2
1.1
0.44
0.22
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.
Magnification
UIS marking
Cover glass thickness
—: May be used with our with-
out a cover glass.
0: Used without a cover glass.
-- The UIS series objectives that are not mentioned below can also be mounted on this microscope. --
FN (Field Number)
Objective series
(PL = Plan)
NA (Numerical of Aperture)
Field of view:
The diameter of the area observable on the specimen, expressed in mm.
Summary of Contents for GX41
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