3
COMPONENTS OF THE MICROSCOPE
ARM – the vertical column (attached to the base) which supports the
stage and contains the coarse and fine adjusting knobs and focus
mechanism.
BASE – the housing and platform of the instrument to which the arm is
attached. The base stands on rubber feet and contains the illuminator
assembly.
COARSE FOCUS – the larger, outside knob of the focus control which
facilitates rapid and heavy movement of the focusing mechanism. In
order to prevent gear damage, the focus control is equipped with
an upper limit stopper that protects the high magnification objectives
and slides. The system is also furnished with a tension control to prevent
“stage drift”.
COAXIAL CONTROLS – the focusing mechanism moves the stage up and
down to bring the specimen
into focus. The coaxial focusing system
combines both the coarse and fine focus into one knob located on both
sides of the microscope. The clutch mechanism is equipped with a safety
slipping feature (which comes in to play at either end of the focus range)
as a protection for the brass rack and steel pinion gears. The control is
designed for a continuous operation over the range of the stage
movement.
CONDENSER – the function of the condenser is to provide full
illumination to the specimen plane and to enhance the resolution and
contrast of the object being viewed. The standard condenser of the
M7000 has a Numerical Aperture of 1.25 with iris diaphragm. It is
mounted in a sub–stage focusing assembly that can be raised or lowered
for precise light control.
DIOPTER ADJUSTMENT – located on the left eyepiece of the binocular
head and is designed to help compensate the difference between the
user’s eyes.
EYEPIECES – the upper optical element that further magnifies the
primary image of the specimen and brings the light rays in focus at the
eyepoint.
