Quick Answer:
Roll-2-Roll® Sensors use spatial light filtering that automatically adapts to any material properties.
Roll-2-Roll® Sensors use patented fiber-optic technology with adaptive edge detection algorithms. Unlike ultrasonic sensors that measure sound reflection (affected by material density and porosity) or simple infrared sensors that require threshold adjustment, [rr sesors] use spatial light filtering to detect edges regardless of material properties. The fiber array captures scattered light from any material, and the controller's adaptive edge-detection algorithm adjusts to its reflectivity and transparency, so no recalibration is needed—whether running clear films, opaque substrates, metallic foils, or porous nonwovens.