Optical Sensor for Non-contact Inline Layer Thickness Measurement of Thin Film and Coating
Coatings are becoming progressively thinner owing to the high prices of raw materials. The extremely thin layers (e.g. adhesive layers), generally measuring less than 1 µm, then have to be applied very homogeneously and in exactly the right thickness. The substrate material can range from highly transparent (e.g. glass) to highly reflective (e.g. aluminium).
Mounted on a traverse in a production environment, a StraDex t sensor is able to measure both wet and dry layers. The sensor can also be placed in a specially designed housing for applications in explosion protected areas. Two-dimensional offline studies of a coated material are feasible with this sensor installed in a SemDex inspection system.