Method and system for area-wise characterisation and quality control of at least partially optically translucent and internally optically scattering products

摘要

Nondestructive quality control and characterization of translucent products with internal light scattering comprises projecting a high-resolution light pattern on the surface, imaging the halo around the light pattern, and comparing the intensity, spectral composition, extent and/or shape of the image with that of a reference product. An independent claim is also included for an apparatus for carrying out the process, comprising a projector, an imaging sensor and an image analyzer.