...

• A slight curvature on the window can be allowed.
• In x-direction, a maximum angle of 15° between window normal and sensor module's optical axis is recommended, for all parts of the window within the sensor module's TAA.
  
• In z-direction, the angle should be maximum 5°.
  
  , which corresponds to a minimum radius of 12 mm for the surface closest to the sensor module. 
  
  
• Keep window thickness as small as mechanically feasible, to reduce absorption losses.