Mobotix
Mobotix MX-SM-OPT-POL Polarization Filter For Sensor Modules
Suitable for all M1x/S1x sensor modules except with the lenses B016, B036, B500 and CSVario or CS Mount Filter replaces the lens cover (made of glass) Example: Recognition of people through the windshield of a car - the filter reduces the mirror reflection (and about 50 % of the sensor light sensitivity)