METHOD FOR CALCULATING AN OPTICALLY RELEVANT MOTOR VEHICLE COMPONENT WITH A LIGHT-SCATTERING SURFACE

The invention relates to a method for calculating an optically relevant motor-vehicle component (1) with a light-diffusing surface (1a), comprising the following steps: a) selecting a predeterminable BSDF distribution (2) of the light-diffusing surface (1a) of the optically relevant motor-vehicle component (1), wherein the light-diffusing surface (1a) is made up of light-diffusing micro-optical elements (3a, 3b, ... 3x), b) selecting the information as to whether the light-diffusing surface (1a) acts exclusively in a reflectively light-diffusing manner or whether there is a transmitting fraction, wherein, in the case of the presence of a transmitting fraction, this is also followed by a step b1) in which a material of which the surface (1a) is made up is selected to take into account the refractive index, c) selecting a parameter predetermining the size range of the micro-optical elements (3a, 3b, ... 3x) from a predeterminable selection range, d) calculating different forms of micro-optical elements (3a, 3b, ... 3x) and the quantitative distribution thereof according to an algorithm (4) for achieving the BSDF distribution selected according to step a) while taking into account the selected size range according to step c) and also, if applicable, the optical properties of the material according to step b1), wherein the surface is made up according to step a) of a multiplicity of micro-optical elements (3a, 3b, ... 3x) which are arranged two-dimensionally alongside one another and consist of the material according to step c), wherein the algorithm comprises the following substeps: d1) using at least part of the BSDF distribution, d2) dividing the distribution according to step d1) into angle-dependent subregions, d3) calculating the geometrical form of the reflection or transmission surfaces of micro-optical elements for each subregion, d4) determining the quantitative fraction of the micro-optical elements for each subregion in dependence on the value of the distribution function for the subregion, d5) randomized distribution (Pa, Pb, ...Px) of the micro-optical elements (3a, 3b, ... 3x) determined according to step d4) over the surface (1a) of the optically relevant motor-vehicle component (1), e) outputting the result of the calculation according to step d) in the form of digital data (D).