Patent ID: 8842271
Filing Date: 2014-09-23
Classification: G01B,G01N

Abstract:
1. Device for testing the quality of microstructurization of a surface in the case of known target microstructurization quality, comprising a radiation source for coherent radiation, a first detector, a second detector and a masking system, which are set up and arranged with respect to one another so that (a) radiation emitted by the radiation source onto a surface, which is provided with a microstructurization of the target quality, produces a diffraction pattern, (b) the diffraction maximum of order “n” of the diffraction pattern would, without the masking system, impinge on the first detector, (c) the masking system prevents ≧80% of the photons that are to be assigned to the diffraction maximum of order “n” from impinging on the detector and (d) the diffraction maximum of order “a” of the diffraction pattern impinges on the second detector, wherein “n” is selected from the group consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 and “a” is selected from the group consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 and a≠n.