A glare sensor includes a light condensing means for condensing light beams from the fore scene and photo sensing element for sensing the light beams from the light condensing means. The photo sensing element is constructed with photodiodes. Blue filters are selectively coupled with the photodiodes....http://www.google.fr/patents/US5426294?utm_source=gb-gplus-shareBrevet US5426294 - Glare sensor for a vehicle
