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Integrating the Scanner Behind a Window
CAUTION
It is recommended to conduct scan performance testing with any win-
dow to determine if the performance level is acceptable for the applica-
tion.
Window material should be transparent with 92% transmission
•
to wavelength 625nm and 850nm.
•
Only a flat window must be used.
•
The window should be as thin as possible (thickness less than
2mm).
•
The window should be as close to the illumination LEDs as pos-
sible to avoid LED ghost images or light reflections. Tilting the
window and/or anti-reflective coating can help mitigate illumi-
nation reflections.
Performance degradation may include:
•
The scan module will not read very low contrast labels.
•
The scan module will not be able to wake up, especially in low
ambient light (typically <100Lux). In this case, the scan module
may need its wakeup sensitivity setting increased.
Integration Guide
The addition of a host enclosure window could
degrade scanner performance. This is due to the
optical reflective surfaces that will cause interfer-
ence with the imaging technology.
Mounting the Scanner
17
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