Automotive Lighting Reutlingen Gmbh

Steffen Wiersdorff

Matthias Gebauer

Hermann Kellermann

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.

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

The invention relates to an illumination device, particularly for automobiles, with a light source and a light conductor that emits the light from the light source conducted within it via a light decoupling surface, whereby light decoupling elements are positioned on the side opposite the light decoupling surface that divert light toward the light decoupling surface, whereby the light decoupling elements possess at least two diverting surfaces, and the first diverting surface is positioned closer to the light source than the second diverting surface of a light decoupling element, each of which subtends an angle with the light decoupling surface whereby the angles of the diverting surfaces are so selected that at least a portion of the light striking the second diverting surface is transmittable through it under refraction, and may be again coupled into the light conductor by means of the first diverting surface of the subsequent decoupling element, whereby this light is at least partially conducted from the first onto the second diverting surface of an decoupling element, and may be decoupled toward the decoupling surface by means of the second diverting surface.

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Metzingen, Germany

Steffen Wiersdorff