Patent ID: 6010233
Filing Date: 2000-01-04
Classification: F21S

Abstract:
An automotive headlamp reflector unit comprising:a one-piece light reflector with a light source mounted generally in the middle of the reflector, the reflector being formed of separate curved segments arranged to form a composite reflective surface, each segment being curved to provide an optimum light beam pattern in a predetermined direction and of a predetermined shape, with all of the light beam patterns together forming a composite beam;and the reflector and light source are formed for mounting within headlamp support frames of different shapes and sizes for various automobiles,and wherein the separate curved segments are defined by the following form of fourth order polynomial:A*Z 4+B*Z 2+C*X*Z 2+D*Y*Z 2+E*X+F*Y+G*X 2+H*Y 2+I*X*Y+J=OwhereA=1B=-2*(K 2+XO 2+YO 2)C=4*XOD=4*YOE=-4*XO*(K 2+XO 2+YO 2)+8*K 2*XOF=-4*YO*(K 2+XO 2+YO 2)+8*K 2*YOG=4*XO 2-4*K 2H=4*YO 2-4*K 2I=8*XO*YOJ =(K 2+XO 2+YO 2) 2-4*K 2* (XO 2+YO 2)K=SQRT(X 2+Yp 2+Zp 2)-SQRT((Xp-XO) 2+(Yp-YO) 2).wherein point (Xp,Yp and Zp) is an arbitrary point on the separate curved segments.