32
4-8 Objectives with Correction Collar
1
a
} If the thickness of the cover glass or the vessel does not match the
thickness scale of an objective with correction collar, the objective
cannot manifest its performance. When using a correction collar
equipped objective, perform the following adjustment as required.
Adjustment Procedure
· If the cover glass thickness is known, set the correction collar
a
to
that value on the scale.
· If the cover glass thickness is unknown, adjust the correction collar
a
and rotate the fine adjustment knob alternately until the position-
ing with the highest contrast is obtained.
} Be careful not to touch the correction collar
a
when turning the
revolving nosepiece.
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