Meiji Techno ML 8500 Series, Instruction Manual

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OPERATING INSTRUCTIONS
OPTICAL SET-UP AND BRIGHTFIELD ILLUMINATION
After connecting the illuminator plug to the receptacle at the back of the microscope base, please
follow as indicated below:
[1] Turn on the illuminator. Place the specimen slide you wish to examine on the microscope stage
and rotate the nosepiece to bring the 10X objective into position for focus.
[2] Make sure that both the field iris
(a) and the aperture iris (b) are fully
open.
[3] Slide the Illumination Selector to the central position where the middle Empty Hole comes
across the Light Axis. This is the Brightfield Illumination.
ILLUMINATION SELECTOR
[4] Pull the Analyzer Slide out to the full so the Analyzer gets out of the light path.
[5] Focus down on your specimen slide until surface detail can be seen. Adjust the brightness of the
built-in light source, using the intensity control knob, left-hand back on the base.
[6] BINOCULAR ADJUSTMENT
Comment: Using a binocular body is much more efficient and less tiring than monocular bodies, but it
must be adjusted correctly. When it is perfectly adjusted the images coming from the two eyepieces are
“fused” into one better image in eyes of the observer.
6 3
Receptacle
SELECTOR LEVER
Polarizer
Empty hole for Brightfield
Darkfield stopper
SLIDE-IN ANALYZER
The Analyzer is mounted in an in-tube slider which moves the analyzer in and out of the optical path
and rotates between 0 and 90 by the lever . When “in” and at 45 position, and with the
Polarizing filter in position, these elements are said to be “crossed” and the field of view is said to be
“extinguished”. In this condition the
field of view is dark - except for
optically active elements in the field,
which rotate the angle of polarization
and thus become visible against a
dark background.
TRANSMITTED LIGHT ILLUMINATION
To cover observation of both transparent and semi-transparent specimens, this series of metallurgical
microscopes are provided with a set of transparent glass stage plate, substage condenser and a semi-
Koehler type 6V 30W Halogen lamp illuminator. The usage of the Transmitted Light illuminator is as
follows:
[1] Place the specimen at the center of the stage plate, and switch on and control the light by simply
rotating the Intensity Control knob .
[2] Lift up the substage condenser to the utmost by the Condenser Focusing Control and then open
up the irises for Field and Aperture.
[3] Focus down on the specimen, and also focus on the closed Field Iris itself. These two focused
images of the specimen and the closed Iris are seen overlapped. Then, open the Field Iris slowly
until the field of view comes to cover the whole image of the specimen. Reduce the Aperture slowly
until you can view the image in the best appearance. Too much reduction of Aperture Iris is not good
as the resolution capacity gets much less due to the roughened image. (By the way, the closed Field
Iris can not be seen through 100X objective.)
Analyzer slide
Analyzer rotating
lever
Tension control knob
Condenser Focusing
Control
Field Iris & Control
Condenser centering
screw
Aperture Iris & Control
lever
Intensity Control knob
Analyzer
Slider