METHOD FOR CALCULATING THE SURFACE AREA OF OPTICAL LENSES AND PROJECTION LENSES MANUFACTURED ACCORDING TO THE METHOD FOR USE IN A LIGHT MODULE IN A MOTOR VEHICLE HEADLAMP

摘要

A method for calculating the surfaces of optical lenses including the steps of: providing a desired light distribution to be generated with light passing through the lens; deforming a first surface of the lens to generate light source images of different sizes; deforming a second surface of the lens to displace the light source images such that they lie at their highest point directly at or on a light/dark border in a resulting light distribution; determining a quality of the resulting light distribution by a comparison with the predefined light distribution; if the quality lies above a predefined limit value, storing the calculated surfaces for the lens; otherwise, renewed deformation of the first surface; renewed deformation of the second surface; repeating the previous two steps until the quality of the resulting light distribution lies above the limit value; and storing the calculated surfaces for the lens.

主权项

1. A method for calculating surfaces of optical lenses comprising the steps of:
a) providing a desired light distribution to be generated by light passing through the calculated lens; b) deforming a first surface of the lens so as to generate light source images of different sizes in the light distribution; c) deforming a second surface of the lens lying opposite the first surface so as to displace a highest point of the light source images to lie adjacent to a light/dark border in a resulting light distribution obtained with the lens having the deformed surfaces; d) determining a quality of the resulting light distribution by a comparison with the predefined light distribution; e) if the quality lies above a predefined limit value, storing the calculated surfaces for the lens and ending the procedure; f) otherwise, renewing deformation of the first surface so as to generate a different bundling of the light source images in the light distribution; g) renewing deformation of the second surface so as to displace the highest point of the light source images to lie adjacent to the light/dark border of the resulting light distribution; h) repeating steps f) and g) until the quality of the resulting light distribution lies above the limit value; and i) storing the calculated surfaces for the lens and ending the procedure.