Patent ID: 8867043

Claim:
A method of determining properties of in particular textured surfaces comprising the steps of: irradiation of radiation onto the surface to be investigated; detection of at least part of the radiation irradiated onto the surface and reflected by the latter by means of a detector device, selected from the group consisting of a CCD chip, a colour camera, a CMOS camera and an integral sensor which permits a location-resolved evaluation of the radiation striking it, wherein the irradiation and the detection takes place within a housing which is closed apart from an opening used for observing the surface; determination of a first characteristic value (P) from the radiation detected, wherein the first characteristic value (P) is an integrated value which corresponds to an intensity distribution from a multiplicity of individual values, and wherein the first characteristic value (P) is characteristic of a texture of the surface; determination of a second characteristic value (ΔE) from the radiation detected, wherein the second characteristic value is characteristic of a further optical property of the surface, which is not correlated with a specific texture of the surface; determination of a result value (ΔI) on the basis of the first characteristic value (P) and the second characteristic value (ΔE).