21
Fig. 5
55
ASSEMBLY
}Mount the dry type top lens (U-TLD) or oil immersion type top
lens (U-TLO) depending on your observation requirement.
#When replacing the top lens, make sure not to apply ex-
cessive force to the top lens arm.
Mount the top lens @ by rotating it clockwise. (Fig. 5)
#Do not tighten too firmly. Rotate the top lens until it con-
tacts lightly with the lens holder.
Notes on Oil Immersion Top Lens
#Before engaging or disengaging the top lens, lower the
condenser holder and wipe away oil deposed on the top
lens.
(If you attempt to engage or disengage the top lens with-
out lowering the condenser holder, the slide glass may
impede the operation.)
#If a slide glass thicker than 1.2 mm is used, the field iris
diaphragm image may remain fuzzy.
#Use the oil immersion top lens in combination with an
objective of 20X or higher magnification.
5-1 Mounting the Top Lens
@
ax7353_inst.pmd 20.04.2005, 12:2721
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