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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
Illumination wavelengths and 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 over 90% and haze less than 1%. Whether to use an
anti-reflection coating or not depends on the material and application needs.
Scratch Resistance and Coating
Scratch on the window can greatly reduce engine performance. It is suggested to use abrasion resistant
window material or coating.
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