Tin on carbon - universal resolution specimen
This tin on carbon test specimen has a very wide size range of tin
spheres which give high contrast when imaged in the SEM. The
largest spheres canbe used for basic column alignment at low
magnification; intermediate sizedspheres are useful for monitoring
image shift when changing operatingparameters or resolution
checking at low kV; and the smallest spheres can be used for
resolution checking and astigmatism correction at the very highest
Gold on carbon - resolution test specimen
This specimen has a particle size range from approximately 5 - 150nm.
Eachspecimen has a square grid pattern with large crystals in the centre
of each grid square and very fine crystals at the edges of each grid
(as illustrated). Medium and high resolution point separation tests may
be performed on the same specimen. In addition, the larger crystals show
facets which allow an assessment of the grey level reproduction available
at high resolution.