Illuminators
194
Matrix 300N
very light background. In addition, the high number of LEDs and the diffuser
increase background uniformity because the dark bands that are generated by
the spacing between adjacent LEDs are minimized.
Please consider that when using a Diffused Red Illuminator to illuminate surfaces
w
ith linear machining flaws, the well-lighted area depends on the direction of
the machining flaws with respect to the illuminator’s LED sectors, irrespective of
the reading distance.
Clearly, this characteristic fixes the upper limit of the code dimensions
c
ompatible with the use of this illuminator. In reality, it is an actual limit of the
usable part of the field of view. Therefore, this limit must be taken into account
during the feasibility analysis of the solution, including the eventual positioning
variation of the codes with respect to the center of the reader’s field of view.
The arrangement of the LED sectors allows obtaining a well-lighted area even
w
hen the direction of the machining flaws is changed.
Refer to the following images for the dimension of lighted area illuminated by
th
e different LED Groups.
Figure 92 - Color Photo of Code
Figure 93 - Peripheral LED Group
Figure 94 - Central LED Group
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