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INV100-FL
● To recognize the aperture diaphragm, you could remove the eyepiece if necessary.
( you also could insert in the center telescope )then looked into the viewing tube,
you might see a field of view like the figure shown. The proportion could be changed
by dialing the aperture adjustment lever according your need. (①is the image of
the aperture diaphragm , ② is the edge of the objective)
● Generally, when observing the chromatic specimen, you need to set the size of
the condenser aperture diaphragm at 70%～80% of the numerical aperture which marked
in the objective. but if observing the bacterium specimen which not colored, you
could turn the aperture diaphragm lever at the direction of“
”(clockwise)
3.1.9 Using color filters（fig11）
◎ Selecting the appropriate color filters
according your need, it became more effective
to observe or photography the specimen.
Especially, we suggest using the LBD color
filter, which can compensate more neutral
colors.
◎ You could pile up a group of color filters to
the filter holder, if you ensure they are level
and the whole thickness is less than 11mm.
Color
filter
meaning
IF550
Single contrast color filter (green)
（used for the phase contrast
microscopy）
LBD
Color temperature transit color
filter（blue）
（used for bright field observation
and microphotography）
3.1.10
using the aperture diaphragm
（
fig 12
）
◎ When in the bright field observation, the
aperture diaphragm control the numerical aperture
of the illumination system. Only when the numerical
aperture of the objective and the illumination
system being matching, you can obtain the higher
image resolution and contrast, and the increased
depth of field, too.
Fig 11
Fig 12
①
②
70-80%
30-20%
