Color Contrast Considerations For Dpm Applications - Datalogic Matrix 300N Series Product Reference Manual

ILLUMINATORS

Color Contrast Considerations for DPM Applications

Matrix 300N DIF / MLT-DPM models are available in Red and Blue Light versions to help
resolve applications that have colored codes and/or backgrounds.
e choice between the blue or red illuminator should be
ne in order to maximize the contrast between the code
d its background; in general, a code illuminated with a
ht of the same color becomes brighter, on the other
nd when illuminated with an opposite color it appears
rker (see the Chromatic Circle Chart).
nsequently during the reading phase the lighting sys-
m changes the chromatic rendering of the target
cording to the color of the illuminator, modifying the
ntrast between target and background. See the exam-
es below.
Color Photo of Codes
STD White Light
Good contrast on all codes
202
MATRIX 300N
MLT-DPM Blue Light
Red code
Blue code
(left) has
(right) has
good con-
low contrast
trast
DIF / MLT-DPM Red Light
Red code Blue code
(left) has (right) has
very low good con-
contrast trast