Patent ID: 7213954

Claim:
A multifunction adaptive projector system for motor vehicles comprising: an ellipsoidal reflector having a focal point and an optical axis; a light source; first and second shields, said shields being moveable between a position for low beam light, a position for motorway light, a position for wet road light and a position for high beam light, said shields operable to shield said light source and create a beam cutoff line; an aspherical lens; and a mechanism for varying the positions of said first and second shields in relation to said reflector between said position for low beam light, said position for motorway light, said position for wet road light and said position for high beam light, wherein in said position for low beam light, said first shield is located in proximity of said focal point; in said position for motorway light and wet road light, said first shield is shifted and located a first distance, z 1 , below said focal point where z 1 =b 1 ·α+b 3 ·α 3 +b 5 ·α 5 +b 7 ·α 7 + . . . , for α≈(0 to 3), where b 1,3,5,7, . . . are constants characterizing said aspherical lens and where α is the angle between said beam cutoff line created by said first shield and a horizontal plane; in said position for high beam light, said first shield being shifted and located a second distance below said focal point of said reflector, said second distance being greater than said first distance; in said positions for low beam light, motorway light and high beam light, said second shield being shifted and located above said focal point of said reflector by a third distance; and in said position for wet road light, said second shield being shifted and located above said focal point by a fourth distance, z 3 , where z 3 =b 1 ·β+b 3 ·β 3 +b 5 ·β 5 +b 7 ·β 7 + . . . , for β≈(0 to 5), where b 1,3,5,7, . . . , are constants characterizing said aspherical lens and where β is the angle between said beam cutoff line created by said second shield and a horizontal plane, said fourth distance being less than said third distance.