Olympus CX23, Инструкция по эксплуатации

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15
CX23
Objectives
Magnifi-
cation
Numerical
aperture
N.A.
Numerical aperture of condenser suitable for
observation of microscope specimens
(when setting to 70% of numerical aperture of objective lens)
Plan objective lens
(FN 20)
CX22PL100XO (option)
4X
10X
40X
100XO
0.10
0.25
0.65
1.25
0.1 X 0.7 = 0.07
0.25 X 0.7 = 0.175
0.65 X 0.7 = 0.455
1.25 X 0.7 = 0.875
Aperture stop
The aperture stop of the condenser is a mechanism to adjust the numerical aperture of the condenser to make the incidence
angle of the illumination light to the value suitable for observation.
The observation is available with optimum contrast and resolution by adjusting the numerical aperture of the condenser
appropriately for the numerical aperture of each objective lens.
In general, since the contrast of the microscope specimen is low, it is appropriate to set the numerical aperture of the
condenser to approximately 70 to 80% of the numerical aperture of the objective lens.
The condenser of this product is designed so that the numerical aperture of the condenser is approximately 70% of the
numerical aperture of the objective lens by coinciding the aperture stop lever position with the magnification display position
corresponding to the magnification of the objective lens to be used.
Numerical aperture of objective lens and numerical aperture of condenser suitable for observation