Image Viewing; Operation - Nikon SMZ25 Instruction Manual

1

Image Viewing

Problem
Part of the field of view is
missing.
The field of view is
invisible.
The brightness of the field
of view is not uniform.
Images are dark.
Dirty or dusty field of view
One side of the images is
blurred or images are
distorted.
2

Operation

Problem
Even when looking with
both eyes, an image does
not appear as a single
image.
Eyes become fatigued.
Changing magnification
results in large focal
deviation.
The focal deviation is large
when switching objectives.
The torque of the coarse
focus knob is heavy.
The focus becomes less
sharp over time. The
vertical position of the
zooming body may slide
due to various loads (such
as its own weight or the
load of the counterbalance
spring inside the focus
unit).
Chapter 9
Cause
Devices are not attached correctly.
The optical path switching lever of the tube is
positioned partway.
The nosepiece is not turned to the click
position or is placed in vertical view status.
The objective and/or sample is contaminated
with dirt or dust.
An aperture diaphragm is stopped down too far.
The light intensity of illumination is too low.
The objective is contaminated with dirt or dust.
The sample is contaminated with dirt or dust.
The stage is not attached horizontally.
A sample is tilted relative to the stage surface.
Cause
The interpupillary distance has not been
adjusted.
The diopter has not been adjusted.
The interpupillary distance has not been
adjusted.
The diopter has not been adjusted.
Brightness is inadequate.
The diopter has not been adjusted.
The diopter has not been adjusted.
The torque adjustment ring has been
tightened too much.
The torque adjustment ring is loosened too
much.
Troubleshooting
Attach the devices correctly.
Position the lever correctly.
Firmly turn the nosepiece to the click position for
stereoscopic view to bring the objective into the
optical path.
Clean as needed.
Open it to the proper size.
Adjust the light intensity to an appropriate level.
Clean as needed.
Clean as needed.
Attach the stage correctly.
Correctly reposition the sample on the stage.
Adjust the interpupillary distance.
Adjust the diopter distance.
Adjust the interpupillary distance.
Adjust the diopter distance.
Adjust the brightness of illumination.
Adjust the diopter distance.
Adjust the diopter distance.
Loosen the torque adjustment ring to some extent.
Tighten the torque adjustment ring to adjust the
torque to an appropriate level.
132
Measure
Measure