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Illumination System
Dome Illumination
Dome illumination provides diffused, uniform light. The large, solid angle of illumination
supports imaging of shiny flat surfaces or curved surfaces. This zone is useful on specular
and non-specular surfaces, ideal for de-emphasizing surface texture and elevation
(curves). The dome provides the widest area of coverage at close working distances. It is
important to note that for marks that are a large percentage of the diameter of a curved
surface, closer distances will provide the best performance. In addition to illuminating
marks on curved surfaces, dome illumination also provides diffuse, even bright field illumination,
which will provide thorough coverage on a wide variety of direct part marks.
Blue Dome vs. Red Dome Illumination
The SIMATIC MV340 features two colors of dome illumination to add another dimension of
decode optimization for direct part marks. Using the opposite light spectrum as a part's
surface color will make the part feature appear darker. Using the same light spectrum will
make the part feature appear lighter. The example below shows a green part surface with
a laser-etched Data Matrix.
Blue Dome Illumination
3-8
Dome Illumination
Red Dome Illumination
SIMATIC MV340 User's Manual
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