This document discusses the measurement and evaluation of the characteristics of the splice of different materials in the tire manufacturing process using sheet-of-light sensors. Correlated measurements from two sensors are used to calculate splice properties on materials without a supporting drum. Various systems are in use in a production environment for supervising different stages of the tire building process. The operating principle is demonstrated along with data gained on a tire building machine. The various measurement possibilities with the availability of full 3D material data are discussed as well as the advantages and drawbacks associated with the design choices depending on the prerequisites given by existing machinery.