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control (M3700 series), are used for precise focusing adjustments once
the specimen has been brought into view with the coarse focus controls.
HEAD - the top portion of the microscope that contains the refracting
prisms and the eyepiece tube. The eyepiece is locked onto the eyepiece
tube with a set screw. The head rotates allowing operation of the
microscope from the front or the back, and allows the microscope to be
shared by simply rotating the head. (The head does not rotate on digital
camera models).
ILLUMINATOR – the built-in light source which provides the optical
system with light. The M3600 and M3700 series uses an energy efficient
3.4V, .06W LED (Part # MA2215) which can last up to 50,000 hours of use
before replacement.
ILLUMINATOR RHEOSTAT – Controls the illuminator’s brightness.
IRIS DIAPHRAGM - a round multi-leaf device mounted below the
condenser which is controlled by a lever. It is similar to a camera
shutter and controls the amount of light entering the condenser,
allowing the user to control contrast.
MECHANICAL STAGE - an alternative to stage clips is a mechanical
stage. A mechanical stage holds the slide in place, allowing the user to
move the slide on any x/y axis through the manipulation of two control
knobs or a co-axial control mechanism.
NOSEPIECE - the
revolving turret that holds the objective lenses,
permitting changes in magnification by rotating different powered
objective lenses into the optical path. The nosepiece must “click” into
place for the objectives to be in proper alignment.
OBJECTIVES - the DIN objectives are standard in the industry, with large
numerical aperture (N.A.) to permit maximum resolution. All objectives
are color-coded and parfocaled at a 45mm distance. The 40XRD and the
100XRD are sealed to keep oil residue from seeping into the objective.
These two objectives have a spring loaded tip to prevent accidental
breakage of either the slide or front lens of the objective if they should
come into contact with each other.
ON/ OFF SWITCH - turns the illuminator on or off.
SIEDENTOPF (M3700 series only) – a binocular head design where the
interpupillary adjustment (increasing or decreasing the distance
