Olympus BX61 Manual de instrucciones - Página 24

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Olympus BX61 Manual de instrucciones
Aperture iris
diaphragm image
Objective pupil
Fig. 34
@
Fig. 35
2
Compatibility of Objectives and Condensers
Objective
Magnification
1.25X
2X
4X
10-60X
100X
* When using the U-SC3 swing-out condenser together with a 1.25X to 4X objective, fully open the condenser aperture iris
diaphragm and use the field iris diaphragm in the base as aperture diaphragm. With the 1.25X to 2X objectives, the
surroundings of the field of view may become dark.
}To obtain better illumination in photomicrography using a 1.25X to 4X objective, use of the U-ULC-2 for ultralow magnifi-
cation is recommended.
20
Aperture Iris Diaphragm (Figs. 34 & 35)
70-80%
· The aperture iris diaphragm determines the numerical aperture of the
30-20%
· Since the contrast of microscope specimens is ordinarily low, setting the
}Using the numerical aperture scale:
²
N.A. scale
Achromat/aplanat
U-AAC
Applicable
(FN 26.5)
illumination system. It has an effect of adjusting image resolution and
contrast. Stopping down the aperture iris diaphragm increases the depth
of focus.
condenser aperture iris diaphragm to between 70 and 80% of the N.A. ²
of the objective in use is usually recommended.
Adjust the ratio by removing the eyepiece and looking into the eyepiece
sleeve while adjusting the aperture iris diaphragm ring @ until the image
shown in Fig. 34 is seen.
You can use the condenser numerical aperture scale by adjusting the
aperture iris diaphragm ring @. (Fig. 35)
Condenser
Swing-out
U-SC3
Applicable to FN 22
Applicable (FN 26.5) by moving
top lens out of the light path.*
Engage top lens in light path.
(FN 26.5)
Motorized universal
U-UCD8A
Applicable when U-FWCO1.25X
is combined.
Applicable (FN 26.5) by moving
top lens out of the light path.
Engage top lens in light path.
(FN 26.5)