Datalogic Matrix 320 - Extending DOF with Automatic Image Settings Selection (Cycle All in same Phase) for Liquid Lens Models

EXTENDING DOF WITH AUTOMATIC IMAGE SETTINGS SELECTION (CYCLE ALL IN SAME PHASE) FOR LIQUID LENS MODELS
PRODUCT REFERENCE GUIDE 133
EXTENDING DOF WITH AUTOMATIC IMAGE SETTINGS
SELECTION
(CYCLE ALL IN SAME PHASE) FOR LIQUID LENS MODELS
For Liquid Lens models, multiple Image Acquisition Settings can be configured and
enabled internally through the application software to extend the reader's depth of
field. During each reading phase, decoding will be attempted by applying each enabled
Image Acquisition Setting (cyclically).
Example
Read a 15 mil Data Matrix ECC 200 code covering a range from 140 to 320 mm. The
reading distance range is too long to be covered by a single acquisition setting, so two
acquisition settings could be used in which the first has a Reading Distance of 195 mm
and the second has a Reading Distance of 300 mm. When both are enabled, the reader
cycles through the two settings effectively producing the extended DOF.
Since many factors and parameters contribute to maximizing the reading process, it is
suggested to use the DL.CODE Image Auto-Setup and Focus Autolearn tools to set the
different acquisitions settings.
Multi Image Acquisition Settings Procedure using Automatic Image Settings Selection:
1. Using the DL.CODE Image Auto-Setup and Focus Autolearn tools, set the first
acquisition setting (default) for the 195 mm Reading Distance. Then Save on
Device.
2. Add another Image Setting, and using the DL.CODE Image Auto-Setup and Focus
Autolearn tools, set the second acquisition setting for the 300 mm Reading Dis-
tance. Then Save on Device.
3. On the Reading Phase step > General Settings > Acquisition Settings, set the Image
Settings Selection to Automatic (default). Then Save on Device.
4. Verify that the reader decodes at both distances with the DL.CODE Monitor.
NOTE
Cycling through Image Acquisition Settings that require changing the
Reading Distance parameter (for liquid lens models), drastically reduces
the frame rate due to the liquid lens refocusing delay as well as by the
number of settings simultaneously enabled. Therefore this may not be the
best solution for high speed applications. For high speed applications it is
best to use the External Image Settings Selection (Input Select) feature
described on page 134. Otherwise use multiple readers set to different
reading distances.
NOTE
By default the Image Settings Selection
parameter is set to Automatic.