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Optics
The EM3296 V4 uses a sophisticated optical system. An improperly designed internal housing or improper selection of
window material can degrade the engine's performance.
Window Placement
The window should be positioned properly to let the illumination and aiming beams pass through as much as possible and
no reflections back into the engine (reflections can degrade the reading performance of the engine).
There are two window placement options.
• Parallel window – Primary option for imager engines. The following window distance requirements should be satisfied:
The maximum distance is measured from the front of the engine housing to the furthest surface of the window. In order to
reach better reading performance, the distance from the front of the engine housing to the nearest surface of the window
should not exceed a (a=1mm) and the distance from the front of the engine housing to the furthest surface of the window
should not exceed a+d (a=1mm, d=2mm), as shown in Figure 2-3.
• Tilted window - This option is for laser/imager engines. For the tilted window distance requirements, please see Table
2-2.
Figure 2-3
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