Table of Contents
Advertisement
24
, Top lens
"'
- Swing-out knob
The rop lens of rhe swing-out condenser can be moved
outside the optical path with the swing-out knob.
During normal orthoscopic microscopy or conoscopic
microscopy. the top lens is used while positioned in
the oprical palh. During orthoscopic microscopy
using a low-power objecrive of 4X or lower. swing out
the top lens.
~~--
';;:
.
During measurement of retardation or evaluation by
interference color. swing out the top lens (the
condenser aperture diaphragm may
be
stopped down)
and illuminate with light that is as parallel to the
optical axis as possible.
II
Field diaphragm
The field diaphragm restricts illumination to the area on the specimen being viewed. Turning the
field diaphragm ring changes the size of the field diaphragm. For normal observation. the size of
the diaphragm should be slightly larger than the boundary of the view field. If a broader area than
necessary is illuminated. stray light will enter the view field, creating flaring and reducing the
contrast of the optical image. The correct setting of the field diaphragm is especially important in
photomicrography: generally, good results are obtained by stopping down the field diaphragm to
just slightly larger than the area that will be reproduced on the film. i.e .. the size of the photo
frame.
B
Filters
Three filters are housed in the base of the microscope.
A filter is inserted into the optical path by pressing in the filter insertion lever on the right side of
the microscope. The filter is removed from the optical path by pressing the release lever down.
NCB11 (color balancing filter)
For color balance adjustment and color photomicrography
ND32 (transmission rate: 3%)
For brightness adjustment
NOB (transmission rate: 12.5%)
For brightness adjustment
GIF (Optional)
For retardation measurement and contrast adjustment
(Place on the field lens.)
A diffuser is contained in the microscope. When removing the diffuser from the optical path, turn
the diffuser insertion/removal screw as far as it will go (about 90°) in the counter-clockwise
direction with a hexagonal screwdriver. When returning the diffuser to the optical path, tum the
screw as far as it will go in the clockwise direction.
Advertisement
Table of Contents
