Integration Guide
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Optics
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).
The window should be mounted close to the front of the engine (parallel). 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 furthest surface of the window
should not exceed 3mm and the distance from the front of the engine housing to the nearest surface of the
window should not exceed 2mm.
If the window is required to be in a tilted position, the above distance requirements should be met and tilt
angle should ensure no reflections back into the lens.
Window Material and Color
CIS
’
s responsiveness (mainly to wavelengths of red light
）
should be taken into consideration when choosing
window material and color, in order to achieve the possible highest spectral transmission, lowest haze level
and homogeneous refractive index. It is suggested to use PMMA or optical glass with spectral transmittance
of red light over 90% and haze less than 1%. Whether to use an anti-reflection coating or not depends on the
material and application needs.
≤
3mm
≤
2mm
