Patent ID: 8928886
Filing Date: 2015-01-06
Classification: G01N

Abstract:
1. An apparatus for determining optical properties of a material, comprising a first measuring device having a first radiation device which directs radiation onto the material under a first specified angle of radiation and which includes a first radiation detection device which is located under a first angle of reception with respect to the material and which receives at least a proportion of the radiation directed onto the material by the first radiation device and scattered back from the material, with the first radiation detection device emitting a first characteristic signal which is characteristic of an intensity of the radiation incident on the first radiation detection device, wherein the apparatus further comprises a second measuring device which includes a second radiation device which directs radiation onto the material under a second specified angle of radiation and which includes a second radiation detection device which is located at a certain second angle of reception with respect to the material and which receives at least a proportion of the radiation directed onto the material by the second radiation device and scattered back from the material, with the second radiation detection device allowing a locally resolved evaluation of the radiation incident thereon which is characteristic of an intensity value output in an integrated manner, which radiation is differentiated across a certain area or at least two points or areas of different intensity can be distinguished, and emitting at least one second characteristic signal which is characteristic of the radiation incident on the second radiation detection device, wherein the apparatus has a processor which outputs a value which is characteristic of the material, taking into account the first characteristic signal and the second characteristic signal by comparing both signals with each other, wherein at least first signal values are characteristic of different indices of refraction and in this way a conclusion as to a dullness or gloss of the material is drawn with regard to an index of refraction of the respective material on a basis of said comparison.