Vision Engineering TIM5, Руководство пользователя

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15
3-14 Adjusting the Swing out Condenser (Fig. 32)
The centre of the condenser and the light axes of the objective are
coaxial. This has been adjusted before leaving factory, so the user
doesn’t need to adjust them.
The condenser has been adjusted to its highest setting. It does not
require the user to manipulate this feature.
To move the condenser, please use the ‘condenser focus control’.
When using the high magnification objective, make sure the condenser
is raised; similarly, if you’re using a low magnification objective make
sure the condenser is lowered.
1. Using the Swing out Condenser
2. When using the low magnification objective, make sure the
condenser is away from the light path. While using the high
magnification objective, make sure this is in the light path.
Adjusting the Aperture Diaphragm
The aperture diaphragm is designed for the adjustment of the
numerical aperture, not for the brightness. Generally, reducing the
diaphragm opening to 70 - 80% of the N.A. value of the respective
objective will provide an image of acceptable quality. If you want to
observe the image of the aperture diaphragm, remove one eyepiece
and look through the tube. You will see a dark circle encroaching on
the bottom of the tube.
3-15 Adjusting the Field Diaphragm (Fig. 33)
The control for the field diaphragm is a ring used for adjusting the area
of field diaphragm. When using, turn the ring to reduce the field
diaphragm, look into the field, if the diaphragm image is faint,
complete the follow steps: turn the condenser focus knob, shift the
condenser holder to the position where the observed image in the field
of view is sharp; then open the field diaphragm, let the image fill the
field of view, then reduce the mixed light, which should improve the
quality of the image.
Fig.32
Fig.33