Method for the manufacture of an optically operative system, applicable in particular to headlights of a vehicle

摘要

A vehicle headlamp, especially a car headlight, comprising a reflector 1 with a reflective surface can light a flat target area intended to be illuminated with a desired light distribution through optimum utilization of the headlamp light source. The optically effective surface of the headlamp is therefore characterized by point asymmetry in essentially all planes that intersect the said reflective surface. This can be accomplished by using a method for producing the said optical surface comprising the following stages: mathematically producing the said surface by forming a taper from the bivariate tensor products of the polynomer; mathematically deriving data in computer input format from the said mathematical presentation: and feeding the said data into a computer for controlling a device by means of which the mathematical production of the said optical surface is reproduced in physical form. Such tapers are in turn produced and then modified, especially either by the so-called Bezier method or by the so-called base taper method. <IMAGE>