Page 19 - Shimadzu EPMA-8050G

Image Tracking Software Transmitted Polarization Observation System

In general, in mapping analysis, the higher the magni cation and the longer the time, the more likely the image is With this option, some of the functions of a transmission polarization
to be distorted due to image drift. However, this software corrects image drift during analysis and reduces image microscope, widely used in mineralogy and crystallography research, are
distortion. achieved with an EPMA optical observation system. Rock akes and other aked
samples are exposed to polarized light from below, and the transmitted light is
observed with an EPMA optical observation system, enabling polarization
˔ Features
observation.
This software corrects the drift in real time without stopping the beam scanning. The time required for When samples are observed with a transmission polarization microscope already
analysis is the same as in normal cases, so the sample is not excessively damaged by heat. In addition, in the customer's possession, and are then observed or analyzed via EPMA
since the high-precision correction operation is frequently repeated, a level difference caused by the based on the knowledge obtained, the observational functions of this product
correction is hardly generated in the image, and the element map image with little distortion is obtained will be useful in searching for target positions. Observation and analysis can be
generally. performed using an electron beam while performing polarization observations.
˔ Features
Scanning image for a short time Observations can be performed in both open nicol and crossed nicols modes.
Scanning image for a short Sample Observation in Sample Observation in
time is not distorted, but... Open Nicol Mode Crossed Nicols Mode
In open nicol mode, light passed through a In crossed nicols mode, observation is
polarizing element (polarizer) is used to performed through a polarizing element
illuminate the sample from below. The (analyzer) configured to an angle
transmitted light is then observed with the EPMA orthogonal to the polarizer. Mineral types
optical microscope. Mineral types are inferred by are inferred from interference colors that
observing the boundary between neighboring appear depending on the type and thickness
minerals, and comparing refractive indices and of the mineral sample.
studying the presence or absence of coloration.
Polarization observations can be performed Sample Observations When the Polarization Angle Is Changed
without rotating the sample.
Typical Long Time Mapping Analysis Example With this system, the angle of the polarized light is changed by
controlling the rotation angle of the polarizer and analyzer. As a result,
In the long time mapping, the observations can be performed without rotating the sample.
image is easy to be distorted
by the effect of the image
drift. Polarization Angle: 85° Polarization Angle: 113°
Collisions between the light guide and sample base due to improper operation are prevented.
When polarization observations are performed, the polarization observation sample base is used, and the tip of the polarization illumination optical path
(light guide) is moved directly below the sample. When a standard sample base is used, the light guide tip is retracted to prevent collisions with the sample
base. This system identifies the polarization observation sample base, and controls the stage and light guide accordingly, enabling it to prevent collisions due
to improper operations.
The control window for polarization observations is linked The stage map for the polarization
to insertion of the polarization observation sample base. observation sample base can be used.
Example of analysis using image tracking function
By using the image tracking
function, it is possible to
obtain a mapping image with
little distortion.
Window display is linked to
the polarization observation
sample base

Operational Windows in the Observation Window Stage Map Selection Window
The control window for polarization observations displayed on the PC is linked to insertion The stage can be moved to the intended observation
of the polarization observation sample base into the instrument. Operations following position utilizing the stage map corresponding to the
insertion of the polarization observation sample base can be smoothly performed. polarization observation sample base.
EPMA-8050G
Electron Probe Microanalyzer
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