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It is a reference artifact
fine edges 3 120mm NM-SS 1
Acrylic disc for visibility
electronic industry
Angle cut on one corner for orientation
PELCO® Astigmatism Corrector Grid Tweezers It is a reference artifactDESCRIPTION SEM Astigmatism Correction and Resolution Determination Clear, sharp, high contrast images easy to stigmate and use for checking resolution. Sharp edged gold particles supported on a 3mm diameter 1000 mesh copper TEM grid attached to any specimen mount of the group listed below. This specimen is used to: determine the presence of astigmatism and allow correction determine instrument resolution. See drawings to identify specimen mount and
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