Nikon eclipse lv150 Instruction Manual page 70

Problems
Objective hits the sample
when switched from low
to high magnification.
Sample is out-focused by
objective switching.
Sample does not move
smooth.
Viewfields do not merge
into one when observed
with both eyes.
Eye fatigue
Coarse focus knob is
heavy in rotation
Stage falls on its own
weight and the image is
out-focused.
Stage cannot be raised
by coarse focus knob.
No interference color is
seen on DIC
microscopy.
Interference colors
uneven or low-
contrasted on DIC
microscopy
No sensitive color is
seen on polarization
microscopy
68
Cause
Eyepiece diopter is not adjusted.
Eyepieces are not mounted correctly.
Sample holder is not secured correctly
on stage.
Interpupillary distance is not adjusted.
Eyepiece diopter is not adjusted.
Interpupillary distance is not adjusted.
Eyepiece diopter is not adjusted.
The brightness is not suitable.
Eyepieces with different viewfield
numbers are used for left and right eyes.
Coarse torque adjustment ring is
tightened too much.
Coarse focus stopper ring is locked at
the top limit.
Coarse torque adjustment ring is
loosened too much.
Coarse focus stopper ring is locked at
the bottom limit.
Analyzer or polarizer is not placed in
the optical path.
DIC prism is not placed in the optical
path.
Wrong objective is used.
DIC prism selection does not match the
objective in use.
Lambda plate slider is not placed in the
optical path.
Countermeasures
Adjust the diopter.
Mount them by aligning the positioning
grooves.
Secure it correctly.
Adjust the interpupillary distance.(p.30)
Adjust the diopter.
Adjust the interpupillary distance.(p.30)
Adjust the diopter.
Adjust the brightness with the
brightness control dial or the
combination of ND filters.
Use eyepieces having the same
viewfield number.
Loosen the torque adequately.
Release the coarse focus stopper ring.
Tighten the torque adequately.
Release the coarse focus stopper ring.
Put it in the optical path. (p.36 and 38)
Put it in the optical path.
Use objectives marked "LU Plan" or
"LU Plan Apo."
Match the prism selection according to
the objective.
Put it in the optical path.
(p.30)
(p.56)
(p.48)
(p.30)
(p.30)
(p.26)
(p.27)
(p.28)
(p.27)
(p.28)
(p.39)
(p.39)
(p.37)