"This paper discusses FocalSpec’s patented Line Confocal Imaging (LCI) technology and its use in in-line 2R2 web measurement applications. LCI enables high-speed 3D imaging of continuous web products, such as films, foils, laminates and coatings at sub-micron resolution. Operational principle of the LCI method and its strengths and weaknesses are presented. The method's use in three real-time R2R measurement applications are explored: 1. Coating and substrate surface roughness measurement.
2. Coating, ink and substrate thickness measurement.
3. Measurement of embossed and printed 3D features."