The invention provides a method for measuring the thickness, or non-uniformity of thickness, of one or more layers of a film or article such as a preform. At least one layer contains a known concentration and a substantially uniform distribution of fluorophores. The fluorophores are added to the one...http://www.google.es/patents/US6962670?utm_source=gb-gplus-sharePatente US6962670 - Determination of layer thickness or non-uniformity of layer thickness based on fluorophore additives
Determination of layer thickness or non-uniformity of layer thickness based ...
