To eliminate sunlight interference in outdoor environments, we have used the innovative optical filter technologies. These state of the art filter technologies will eliminate sunlight interferences and provide multi-touch operations in the outdoor environment.
The three filters we used follow:
- Anti-Solar Filter is the polarized filter removing the direct sunlight, which is incoming to the IR sensor plane of the touch panel. This anti-solar filter provides an excellent uniformity.
- Sun-Block Filter removes any reflected and refracted light which is inside the touch module frame. It also helps to get over reflection and refraction phenomenon from the glass.
- Front IR Filter removes lower wavelength of sunlight and improves the transmissivity of IR LED’s wavelength
Overall, these technologies maximize the efficiency of the IR Touch Screens.