Measurement method for measuring layer thicknesses and layer homogeneity in containers coated with slip additives and water-repellant finishings focuses polychromatic light inside the containers

摘要

A first lens (2) focuses polychromatic light on the inner side of a coated container (1) to detect reflected light linked to a spectrometer (5) for recording light via a sensitive charge coupled device detector (7) and transferring it onto a computer (8) that digitalizes a signal and calculates a layer thickness from an interference pattern according to a formula. An independent claim is also included for a device for measuring layer thicknesses and layer homogeneity in containers coated with slip additives and water-repellant finishings.