8
is to take the tooth-like part of the nosepiece to turn it, and make the objective
into correct position and into the bright path.
3.2.6 Use of tension adjustment knob (Fig.4)
The tension adjustment ring can adjust the tension of the coarse and fine
focusing unit to prevent the stage from sliding down automatically and to
improve the comfort of operation. Rotation clockwise makes tension decrease,
and by contraries, rotation counterclockwise makes tension increase.
3.2.7 Use of oil immersion objective
The 100X objective can be used for observation even if without immersion oil.
But little non-synthetic resin immersion oil or distilled water between the
objective and specimens will fully grasp the objective function , bubbles and
impurities can’t in immersion oil which will affect image.
after adjusting with the 40X objective, adding moderate immersion oil
between the front lens of 100X objective and the cover glass of specimen can
make the image clearer. Please pay attention that air bubble and impurity can’t
be in the immersion oil, otherwise, the image would be affected.
▲After immersion oil used, the oil of specimen and the microscope surface
should be cleaned with absorbent cotton, lens paper, gauze or soft cotton cloth
with moderate mixture of pure industrial alcohol and ether (proportion 1:4)
▲Standard thickness 0.17mm cover glass should be chosen when high times
objective used, and thickness error should be within 0.01mm, otherwise, image
definition wouldbe affected.
