Illumination Examples For Dpm Applications; Code Positioning With Respect To Illumination - Datalogic Matrix 300N Series Product Reference Manual

NOTE

Illumination Examples for DPM Applications

The following images have been captured by a Matrix 300N DPM model reader to
demonstrate positioning and contrast considerations for DPM applications.

Code Positioning with Respect to Illumination

Since the various internal illuminators on the DPM models are located above or below
the sensor, the light emitted from them can cause glare in the respective area of the
image. If this glare covers the code, the reader will not be able to see it and therefore
cannot decode it (see the first image in the table below).
Application
Reading a Data Matrix
code etched on a metal
surface (can lid)
Code at FoV center
Reading a Data Matrix
code etched on a metal
surface (can lid)
Code at FoV top
Reading a Data Matrix
code etched on a metal
surface (can lid)
Code at FoV bottom
Reading a Data Matrix
code etched on a metal
surface (can lid)
Code at FoV right
Reading a Data Matrix
code etched on a metal
surface (can lid)
Code at FoV left
For correct use of the MLT-DPM Peripheral and LT-51x illuminators, make
sure that the application working distance is within the lighting system
working distance. See the table under "Lighting System Working Dis-
tances" on page 204.
Non Polarized
No Read
OK
OK
OK
OK
MATRIX 300N RECOMMENDED ILLUMINATION FOR DPM
Polarized
OK
OK
OK
OK
OK
PRODUCT REFERENCE GUIDE
Diffused
OK
OK
OK
OK
OK
201