Method for calculating an optically relevant motor vehicle component having a light-scattering surface

Abstract

The invention relates to a method for calculating an optically relevant motor vehicle component (1) having a light-scattering surface (1a), the method comprising the following steps: a) selecting a predeterminable BSDF distribution (2) of the light-scattering surface (1a) of the optically relevant motor vehicle component (1), wherein the light-scattering surface (1a) is composed of light-scattering micro-optical elements (3a, 3b, ... 3x), b) selecting information about whether the light-scattering surface (1a) has only a reflective light-scattering effect or whether a transmissive part is present, wherein in the case of the presence of a transmissive part, step b1) is also performed, wherein in accordance with step b1), a material for the composition of the surface (1a) is selected in order to take into account the refractive index, c) parameters for a predeterminable size range of the micro-optical elements (3a, 3b, ... 3x) are selected from a predeterminable selection range, d) taking into account the size range selected according to step c) and, if necessary, the optical properties of the material according to step b1) are used to obtain the optical properties according to step b1). a) An algorithm (4) for the selected BSDF distribution calculates different shapes of micro-optical elements (3a, 3b, ... 3x) and their quantitative distribution, wherein the surface according to step a) is composed of a plurality of micro-optical elements (3a, 3b, ... 3x) arranged in a planar manner next to each other, the micro-optical elements consisting of the material according to step c), wherein the algorithm comprises the following sub-steps: d1) using at least a part of the BSDF distribution, d2) dividing the distribution according to step d1) into angle-dependent sub-areas, d3) calculating for each sub-area the geometric shape of the reflection or transmission surface of the micro-optical element, d4) determining for each sub-area the quantitative proportion of the micro-optical elements according to the value of the distribution function for the sub-area, d5) randomly distributing (Pa, Pb, ... Px) the micro-optical elements (3a, 3b, ... 3x) determined according to step d4) on the surface (1a) of the optically relevant motor vehicle component (1), and e) outputting the calculation result according to step d) in the form of digital data (D).

Description

Technical Field

[0001] The invention relates to a method for calculating an optically relevant motor vehicle component having a light-scattering surface.

[0002] Furthermore, the invention relates to an optically relevant motor vehicle component manufactured according to the method according to the invention.

[0003] Furthermore, the invention relates to a motor vehicle headlamp which includes an optically relevant motor vehicle component according to the invention.

[0004] Furthermore, the invention also relates to a motor vehicle which includes an optically relevant motor vehicle component according to the invention and / or a motor vehicle headlamp according to the invention. Background Art

[0005] It is known from the prior art to granulate the surface of an optical structure in order to obtain an improvement in the light function with respect to uniformity, scattered light, spatial visibility, etc. These grains (Narbungen) are usually completely random and not optimized for the field of optical technology applications. In these cases, the grains are optically undefined. As a result, undefined scattering characteristics result. As a result, the resulting light distribution is very inefficient because the light is also scattered in undesired regions. And if targeted scattering characteristics are to be achieved, corresponding regular structures are created in the prior art for this purpose, and these regular structures are furthermore arranged regularly. The surface thus formed no longer appears "irregular" and serves as "scattering", but can be recognized by the naked eye as a regularly structured surface. Summary of the Invention

[0006] The object of the invention is to create a possibility by means of which the scattering behavior of a light-scattering surface can be predefined, yet the micro-optical elements are arranged to create the optical impression of a diffusing surface.

[0007] This object is solved by a method of the type mentioned at the beginning, which according to the invention comprises the following steps:

[0008] a) Select a predefined BSDF distribution of the light-scattering surface of an optically relevant motor vehicle component, wherein the light-scattering surface is composed of light-scattering micro-optical elements,

[0009] b) Select information on whether the light-scattering surface only serves as a reflective light scatterer or whether there is a transmission part, and in the case of the presence of a transmission part, furthermore perform step b1), according to which step b1), in order to take into account the refractive index, a selection of the material of the surface-forming combination is made,

[0010] c) Select a parameter of the size range of predefined micro-optical elements from a predefined selection range

[0011] d) Considering the size range selected according to step c) and, if necessary, the optical properties of the material according to step b1), calculate the different shapes of the micro-optical elements and the number distribution of the micro-optical elements according to the algorithm for obtaining the BSDF distribution selected according to step a), wherein the surface according to step a) is composed of a plurality of micro-optical elements arranged side by side in a plane, the micro-optical elements being composed of the material according to step c), and wherein the algorithm comprises the following sub-steps:

[0012] d1) Use at least a part of the BSDF distribution,

[0013] d2) Divide the distribution according to step d1) into sub-regions related to angles,

[0014] d3) Calculate the geometry of the reflective or transmissive surface of the micro-optical elements for each sub-region (i.e., calculate the required geometry of the micro-optical elements for each sub-region),

[0015] d4) Determine the number share of the micro-optical elements for each sub-region according to the value of the distribution function for that sub-region (i.e., determine, for example, the number ratio compared to other sub-regions),

[0016] d5) Randomly distribute the micro-optical elements determined according to step d4) onto the surface of the optically relevant motor vehicle component,

[0017] e) Output the calculation result according to step d) in the form of digital data.

[0018] In this way, a (for example, particle-like) surface structure can be created, the scattering properties of which can be pre-given by a lighting designer, but the surface structure does not show a regular pattern or structure in its appearance. The scattering properties of the optically relevant component can be pre-given in a targeted manner in this case and thus optimized for the desired application. Therefore, the radiation of false light (Fehllicht) can be largely avoided.

[0019] The expression "optically relevant motor vehicle components" is understood to mean components that are optically relevant and are specified for use in motor vehicles. The expression "optically relevant components" is understood to mean components having the following characteristics: Optically relevant components influence the propagation of light, which is either emitted by the optically relevant component itself or impinges on the optically relevant component, where the optically relevant component interacts with the incident light and then radiates light. Examples of components considered to be optically relevant are: light sources, in particular LEDs and / or laser light sources, diaphragms or diaphragm devices, reflectors, lenses, in particular projection lenses, light conductors, thick-walled optical devices, prisms, gratings, mirrors, MEMS components configured as DMD chips, and / or entire optical modules or assemblies including such components, etc. One or more of the components mentioned can also form an optically relevant component. The optically relevant component can, for example, be held in a support frame and / or be adjustable by means of an adjustment system, where the adjustment system can act on the optically relevant component or the support frame for this purpose.

[0020] The BxDF distribution is a high-dimensional tensor that can be interpreted as a transfer function between the incident and the outgoing light beams. Thus, the BxDF function maps each possible incident light beam onto a solid angle. BRDF function for the reflection half-space, BTDF function for the transmission half-space. The BSDF function can be a combination of BRDF and BTDF and thus covers the entire solid angle. The BSDF distribution can be understood as a function that can output a distribution for each light beam incident on a surface, which distribution indicates how likely it is that the light beam is scattered in a certain spatial direction. And since in practice a very large number of photons arrive at the relevant surface, the scattering probability is of the same significance as the scattered light intensity, because the law of large numbers is always satisfied in light measurements. Thus, for any angle of incidence, a light intensity distribution is obtained. The BSDF distribution correlates each possible incident light beam with all possible angles of emergence. However, it is meaningful to always visualize only a part of the BSDF, in other words the radiation characteristics for a defined angle of incidence.

[0021] The random distribution according to the algorithm of step d), in particular step d5), can be carried out, for example, in the following sub-steps:

[0022] 1. Subdivide the total surface into smaller sub-surfaces,

[0023] 2. Determine the desired (sub-) angle distribution, material, transmission / reflection, etc. for the sub-surfaces,

[0024] 3. Calculate the corresponding angle values and (sub-) angle relationships or weights (according to the BSDF etc. of 2.),

[0025] 4. Initialize the (pseudo) random generator with the desired distribution from steps 2. and 3. (taking into account the angular range and weights).

[0026] 5. Subdivide the sub - surface into smaller individual optical device regions and define representative individual region points (= "grid points").

[0027] 6. Calculate the optical devices at these grid points according to the following sub - steps:

[0028] a. Select a grid point (either deterministically or randomly).

[0029] b. Draw a sample of random angular values (random generator) for the grid point

[0030] c. Calculate the individual optical device shape for the selected angular value

[0031] d. Position the individual optical device from c. at the grid point from a.

[0032] e. Repeat sub - steps a - d until all selected grid points have been assigned an optical device

[0033] 7. Repeat steps 2. - 6. until the sub - surface is occupied by optical devices or the sub - angular distribution is mapped accurately enough.

[0034] 8. Repeat steps 1. - 7. until the total surface is completely occupied or the desired target distribution is mapped accurately enough.

[0035] In this way, a surface with the desired scattering properties generated using random components can be obtained.

[0036] By choosing a maximum size of the micro - optical elements below the perception of the human eye, a structure that is completely unrecognizable can be achieved.

[0037] In particular, it can be specified that at least each micro - optical element is formed in a pyramidal shape, where adjacent pyramidal - shaped micro - optical elements are arranged side - by - side seamlessly.

[0038] In addition, it can be specified that at least each micro - optical element is formed in a conical shape.

[0039] In principle, these structural shapes can also be mixed with each other. Preferably, all micro - optical elements can be formed in a pyramidal or conical shape.

[0040] In particular, it can be stipulated that the inclination of the reflective or transmissive surface of the micro-optical device is between 0° and 45°, and the maximum value of the inclination is preferably between 40° and 45°. In the case of an inclination of 45°, it is already possible to reflect at an angle of 180° by double reflection with the help of adjacent micro-optical elements.

[0041] Furthermore, it can be stipulated that the surface according to step a) has light-reflecting micro-optical elements, and the BSDF distribution is selected such that at least one local maximum is formed in the BSDF distribution function, and the local maximum exceeds the adjacent values offset by +5° or -5° from the angular value of the local maximum by at least 40% in terms of magnitude.

[0042] In particular, it can be stipulated that steps d1) to d5) are iteratively repeated, and in each repetition, additional parts of the BSDF distribution are considered.

[0043] Furthermore, it can be stipulated that the diagonal length of the bottom surface of the micro-optical element is between 350 nm and 2 mm. In the case where the length of the micro-optical element is less than 350 nm, interference effects must already be considered.

[0044] In particular, it can be stipulated that after step d4), the optical appearance of the micro-optical elements is manipulated by forming the geometry of each micro-optical element into a protrusion and the geometry of other micro-optical elements into a depression. This is achieved, for example, by inverting the micro-optical elements (i.e., forming a depression instead of a protrusion; thus the surface can appear more irregular).

[0045] Furthermore, it can be stipulated that the optically relevant motor vehicle component has an optically effective total light-scattering surface, which is composed of optically effective light-scattering sub-surfaces, and each optically effective light-scattering sub-surface has a pre-given BSDF distribution and a selection of micro-optical elements suitable therefor according to the method calculated according to one of the preceding claims, and the algorithm is furthermore set up to consider the BSDF distributions of adjacent sub-surfaces and select and group the respective micro-optical elements of adjacent sub-surfaces in the transition region between the sub-surfaces such that the visually (i.e., with the naked eye) recognizable differences in the distribution of the micro-optical devices between adjacent sub-surfaces are minimized.

[0046] In particular, it can be stipulated that the micro-optical elements are formed on a plastic carrier or a glass carrier, and the micro-optical elements are made reflective by reflectively coating the surface of the plastic or glass carrier by means of aluminum evaporation.

[0047] In particular, it can be stipulated that the plastic carrier is composed of polycarbonate or PMMA.

[0048] Furthermore, the invention relates to an optically relevant motor vehicle component produced by the method according to the invention.

[0049] Furthermore, the invention relates to a motor vehicle headlight comprising an optically relevant motor vehicle component according to the invention.

[0050] Alternatively or additionally thereto, it may also be a signal light system, in particular a turn signal light.

[0051] Furthermore, the invention relates to a motor vehicle which comprises an optically relevant motor vehicle component according to the invention and / or a motor vehicle headlight according to the invention.

[0052] In other words, optional aspects of the present invention may also be described as follows:

[0053] Small micro-optics are calculated on the surface, which can not or almost no longer be distinguished by the naked eye. In this case, an unusual or never-used scheme compared to previous optical devices is used: each optical device is calculated uniquely and independently and has different characteristics from other optical devices on the surface. However, in general, all optical devices in a certain surface area are calculated so that these optical devices produce a defined BSDF distribution (scattering characteristics) as a whole. In the previous scheme, the optical devices are calculated so that each optical device maps the complete light distribution as much as possible. In the random scheme used here, each optical device only causes a targeted small part of the light distribution. Then, the total light distribution is generated by the sum of the individual optical devices. Therefore, each optical element is different from other optical devices in terms of its shape and its appearance, so that a random change in the visible surface texture can be obtained. The optical devices are randomly distributed on the calculated area so that no regular pattern is formed on the surface and the structure corresponds to a random scattering structure or particles in the optical appearance. For the light technology function, it does not matter whether the optical device is formed as a convex or concave. This change (inversion) via random optics has another possibility of revealing visible structures.

[0054] The following further advantages can be achieved by the invention: 1) Apparently random surface structures or diffuser layers can be effectively used as optical components of optical technology, whereby a higher efficiency of the system can be achieved due to targeted use of light. 2) Interesting optical effects via combination and targeted use of adjacent optical elements (e.g. retroreflective particles, etc.). 3) It is not necessary to use the diffraction properties of light to achieve the desired effects of light image formation (pure geometrical optics), whereby simpler and therefore cheaper production methods can be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The invention is explained in more detail below by means of exemplary and non - limiting embodiments illustrated in the figures. Wherein:

[0056] Figure 1a Schematic view showing a cross - section of a micro - optical element,

[0057] Figure 1b Showing an exemplary light beam incident on a micro - optical element according to Figure 1a ,

[0058] Figure 1c Showing an exemplary light intensity distribution of a micro - optical element according to Figure 1a and Figure 1b .,

[0059] Figure 2a Schematic view showing a cross - section of a composite of different micro - optical elements,

[0060] Figure 2b Showing an exemplary light beam incident on a micro - optical element according to Figure 2a .,

[0061] Figure 2c Showing an exemplary light intensity distribution resulting from a composite of micro - optical elements according to Figure 2a .,

[0062] Figure 3a Schematic view showing a cross - section of a composite of a plurality of different micro - optical elements,

[0063] Figure 3b Showing an exemplary light intensity distribution resulting from a composite of micro - optical elements according to Figure 3a .,

[0064] Figure 4a Schematic view showing a cross - section of a composite of a plurality of different micro - optical elements, the micro - optical elements being different from Figures 1a to 3b and not being configured as reflective, but as transmissive and thus refracting light.

[0065] Figure 4b Showing an exemplary light intensity distribution resulting from a composite of micro - optical elements according to Figure 4a .,

[0066] Figure 5a Showing an exemplary light intensity distribution obtainable by targeted design and arrangement of micro - optical elements,

[0067] Figure 5b and Figure 5c Showing composites of different micro - optical elements that can be used to generate different light intensity distributions, respectively,

[0068] Figure 6aShows the surface of an optically relevant component calculated and formed according to the method of the present invention.

[0069] Figures 6b to 6h For different light incidence angles, shows the two-dimensional light intensity distribution of the surface according to Figure 6a and,

[0070] Figure 7 Shows the individual steps of the method according to the present invention in block diagram form.

[0071] In the following figures, unless otherwise stated, the same reference signs denote the same features. Detailed Description

[0072] Figure 1a Shows a schematic cross-section of the micro-optical element 3a. The micro-optical element 3a is arranged on the surface of an optically relevant motor vehicle component 1 (see Figure 6a ). The component 1 according to Figure 6a can in principle have any size, for example the length and width can vary between a few millimeters and several meters. The component 1 according to Figure 6a has a length and width between 2 cm and 3 cm respectively. Thus, for example, thousands to millions of micro-optical elements can be arranged on the surface, and these micro-optical elements (which are very small in the current example) cannot be individually identified in the shown figures.

[0073] The present invention relates to a method for calculating an optically relevant motor vehicle component 1 (see FIG. 6) having a light-scattering surface 1a, the method comprising the following steps:

[0074] a) Select a pre-given BSDF distribution 2 of the light-scattering surface 1a of the optically relevant motor vehicle component 1 (see for example Figure 3b , Figure 4b , Figure 5a , Figures 6b to 6h ), wherein the light-scattering surface 1a is composed of light-scattering micro-optical elements 3a, 3b,... 3x (see Figure 3a ).

[0075] b) Select information on whether the light-scattering surface 1a only acts as a reflective light scatterer or whether there is a transmission part. In the case of the existence of a transmission part, step b1 is additionally carried out. According to this step b1, in order to take into account the refractive index, the material of the surface 1a is selected.

[0076] c) Select a parameter of the pre-given size range of the pre-given micro-optical elements 3a, 3b,... 3x from a pre-given selection range.

[0077] d) Taking into account the size range selected according to step c) and, if necessary, the optical properties of the material according to step b1), according to algorithm 4 for obtaining the BSDF distribution selected according to step a) (see Figure 7 ) calculate the different shapes of the micro-optical elements 3a, 3b,... 3x and the number distribution of these micro-optical elements, wherein the surface according to step a) is composed of a plurality of micro-optical elements 3a, 3b,... 3x arranged side by side in a plane, the micro-optical elements being composed of the material according to step c), and wherein the algorithm comprises the following sub-steps:

[0078] d1) Use at least a part of the BSDF distribution (e.g., the distribution at an incident angle of 0°).

[0079] d2) Divide the distribution according to step d1) into angle-related sub-regions.

[0080] d3) Calculate the geometry of the reflective or transmissive surfaces of the micro-optical elements for each sub-region.

[0081] d4) Determine the number share of the micro-optical elements for each sub-region according to the value of the distribution function for that sub-region.

[0082] d5) Randomly distribute the micro-optical elements 3a, 3b,... 3x determined according to step d4), Pa, Pb,... Px, onto the surface 1a of the optically relevant motor vehicle component 1.

[0083] e) Output the calculation result according to step d) in the form of digital data D (see Figure 7 ).

[0084] Figure 1b Shows exemplary light beams L Figure 1a incident on the micro-optical element 3a according to 1 and reflected. 2 . These light beams are incident, for example, at an incident angle of 90°, and the light beam L 1 hits the inclined surface of the micro-optical element 3a (the inclination is α 1 = 25°). The light beam is reflected at an angle of 2xα 1 , i.e., 50°, measured with respect to the vertical incident direction. The horizontal dashed line here should indicate the substantially straight course of the reflective surface 1a, which deviates from the precisely straight course only due to the unevenness of many micro-optical devices. Relative to the surface 1a, the reflected light beam is inclined at an angle γ 1 = 90° - 2 x α 1 = 40°. The light beam L 2Are reflected in a similar manner. In this case, due to the symmetric structure of the micro-optical element 3a, the relevant angles are substantially the same as L 1 , except that the light beam L 2 is deflected to the right instead of to the left. However, an asymmetric geometry can also be provided.

[0085] Figure 1c Shows the reflection characteristics of the micro-optical device 3a. Figure 1c Shows the exemplary light intensity distribution (i.e., a part of the BSDF distribution - i.e., for an incident angle of 90°) of the micro-optical element 3a according to Figure 1a and Figure 1b .

[0086] Figure 2a Shows a schematic cross-section of a composite of different micro-optical elements 3a and 3b. Figure 2b Shows an exemplary light beam incident on the micro-optical element 3b according to Figure 2a . The micro-optical element 3b is configured, for example, to be flatter, where the angular size is α 1 = α 2 = 10°. From this, the reflection angle γ 1 = γ 2 = 70°. Figure 2a The lengths l 1 and l 2 in 1 represent the area fractions of the micro-optical elements 3a and 3b on the surface 1a. The current ratio is l 2 . Assuming that the surface 1a consists only of these two micro-optical elements 3a and 3b and these micro-optical elements are distributed in an area ratio of 2:1, an exemplary light intensity distribution of the reflected light according to Figure 2c is obtained, where the light is incident on the surface 1a at an angle of 90° in this case. The intensity of the light reflected at an angle of + / - 40° will be half the intensity of the light reflected at an angle of + / - 70°.

[0087] In Figures 1a to 2c , the relevant micro-optical elements have a pyramidal shape, where adjacent pyramidal micro-optical elements are arranged seamlessly side by side. Alternatively, each micro-optical element can also be configured conically (see Figure 5c ).

[0088] Figure 3a Shows a schematic cross-section of a composite of a plurality of different micro-optical elements 3a to 3x, which are combined into the surface 1a. Figure 3b Furthermore, an exemplary light intensity distribution resulting from a composite of the micro-optical elements 3a to 3x according to Figure 3a is shown. Here, for example, a normal distribution is involved.

[0089] Figure 4a Schematic cross-section showing a composite of a plurality of different micro-optical elements 3a' to 3x', as opposed to Figures 1a to 3b which, the micro-optical elements 3a' to 3x' are not configured to be reflective, but are configured to be light-transmissive and thus refract light. The reflection effects and angles described in conjunction with Figures 1a to 3b can in principle be achieved in a similar manner by light refraction. Figure 4b Showing an exemplary light intensity distribution resulting from a composite of micro-optical elements 3a' to 3x' according to Figure 4a which,

[0090] Figure 5a Showing an exemplary light intensity distribution that can be obtained by targeted design and arrangement of the micro-optical elements. For example, the distribution for an incident angle of 90° is shown, where the surface 1a and thus the BSDF distribution are selected such that at least one local maximum I is formed in the BSDF distribution function 1 which local maximum exceeds the adjacent value I offset by +5° or -5° in terms of the angular value relative to the local maximum by at least 40%. In the current example, this value I 2 is exceeded by more than 100%. A directional effect of reflection or transmission can be obtained through a distribution in the sense of 2 where each local maximum corresponds to a directional effect. The distribution according to Figure 5a for example has four very distinct maxima (at approximately + / -40° and + / -70°) and a less distinct maximum at 0°. Figure 5a

[0091] Figure 5b and 5c respectively show composites of different micro-optical elements that can be used to produce different light intensity distributions.

[0092] Figure 6a Showing an optically relevant component 1 including a surface 1a calculated and formed according to the method of the present invention. Figures 6b to 6h Showing the two-dimensional light intensity distribution of the surface according to Figure 6a for different light incident angles, from which the BSDF distribution can be derived.

[0093] Figure 7 The individual steps of the method according to the present invention are shown in block diagram.

[0094] The present invention is not limited to the embodiments shown, but is defined by the full scope of the claims. Respective aspects of the present invention or embodiments may also be considered and combined with each other. The possible reference signs in the claims are exemplary only and are intended solely for easier readability of the claims and do not limit these claims.

Claims

1. A method for calculating an optically relevant motor vehicle component (1) having a light-scattering surface (1a), the method comprising the following steps: a) Selecting a pre-given BSDF distribution (2) of the light-scattering surface (1a) of the optically relevant motor vehicle component (1), wherein the light-scattering surface (1a) is composed of light-scattering micro-optical elements (3a, 3b,... 3x'), b) Selecting information on whether the light-scattering surface (1a) only acts as a reflective light scatterer or whether there is a transmission part, and in the case of the existence of a transmission part, step b1) is further carried out. According to step b1), in order to take into account the refractive index, a selection of the material composing the surface (1a) is made, c) Selecting a parameter for pre-giving the size range of the micro-optical elements (3a, 3b,... 3x') from a pre-given selection range, d) Calculating the different shapes and the number distribution of the micro-optical elements (3a, 3b,... 3x') according to an algorithm (4) for obtaining the BSDF distribution selected in step a), taking into account the size range selected in step c) and the optical properties of the material according to step b1), wherein the surface according to step a) is composed of a plurality of micro-optical elements (3a, 3b,... 3x') arranged side by side in a plane, and the micro-optical elements are composed of the material according to step b1), and the algorithm includes the following sub-steps: d1) Using at least a part of the BSDF distribution (2), d2) Dividing the distribution according to step d1) into sub-regions related to angles, d3) Calculating the geometry of the reflective or transmissive surfaces of the micro-optical elements (3a, 3b,... 3x') for each sub-region, d4) Determining the number share of the micro-optical elements (3a, 3b,... 3x') according to the value of the distribution function for each sub-region, d5) Randomly distributing (Pa, Pb,…Px) the micro-optical elements (3a, 3b,... 3x') determined according to step d4) onto the surface (1a) of the optically relevant motor vehicle component (1), e) Outputting the calculation result according to step d) in the form of digital data (D).

2. The method according to claim 1, wherein each micro-optical element is formed in a pyramidal shape, and the adjacent pyramidal micro-optical elements are arranged side by side seamlessly.

3. The method according to claim 1, wherein each micro-optical element is formed in a conical shape.

4. The method according to claim 2 or 3, wherein the inclination of the reflective or transmissive surface of the micro-optical elements (3a', 3b',... 3x') is between 0° and 45°, and the maximum value of the inclination is between 40° and 45°.

5. The method according to any one of claims 1 to 3, wherein the surface (1a) according to step a) has light-reflecting micro-optical elements (3a, 3b,... 3x), and wherein the BSDF distribution is selected such that in the BSDF distribution function, there is formed at least one local maximum (I 1 ), the local maximum exceeding in magnitude an adjacent value that is offset by +5° or -5° in angular value with respect to the local maximum (I 2 ) by at least 40%.

6. The method according to any one of claims 1 to 3, wherein steps d1) to d5) are iteratively repeated, and an additional part of the BSDF distribution is considered in each repetition.

7. The method according to any one of claims 1 to 3, wherein the diagonal of the bottom surface of the micro-optical element (3a, 3b,... 3x') has a length between 350 nm and 2 mm.

8. The method according to any one of claims 1 to 3, wherein after step d4), the optical appearance of the micro-optical elements (3a, 3b,... 3x') is manipulated by configuring the geometry of each micro-optical element (3a, 3b,... 3x') as a protrusion and the geometry of other micro-optical elements as a depression.

9. The method according to any one of claims 1 to 3, wherein the optically relevant motor vehicle component (1) has an optically effective total light-scattering surface (1a), which is composed of optically effective light-scattering sub-surfaces, wherein each optically effective light-scattering sub-surface has a pre-given BSDF distribution and a selection of micro-optical elements (3a, 3b,... 3x') calculated according to the method according to any one of the above claims suitable therefor, wherein the algorithm (4) is also set up to take into account the BSDF distributions of adjacent sub-surfaces and to select and group the respective micro-optical elements (3a, 3b,... 3x') of adjacent sub-surfaces in the transition region between the sub-surfaces such that the visually recognizable differences in the distribution of the micro-optical devices (3a, 3b,... 3x') between the adjacent sub-surfaces are minimized.

10. The method according to any one of claims 1 to 3, comprising an additional step f): f) manufacturing an optically relevant motor vehicle component (1) having a light-scattering surface (1a), the surface comprising the distribution of micro-optical elements (3a, 3b,... 3x') arranged according to the calculation results or data of step e).

11. The method according to claim 10, wherein the micro-optical elements (3a, 3b,... 3x) are formed on a plastic carrier or a glass carrier, and wherein the micro-optical elements (3a, 3b,... 3x) are configured to be reflective by reflectively coating the surface of the plastic or glass carrier by means of aluminum evaporation.

12. The method according to claim 11, wherein the plastic carrier consists of polycarbonate or PMMA.

13. An optically relevant motor vehicle component (1), which is manufactured according to the method according to any one of claims 10 to 12.

14. A motor vehicle headlight, which comprises the optically relevant motor vehicle component (1) according to claim 13.

15. A motor vehicle, which comprises the optically relevant motor vehicle component (1) according to claim 13 and / or the motor vehicle headlight according to claim 14.

Images