Figure S1 from Body-monitoring with photonic textiles: a reflective heartbeat sensor based on polymer optical fibres

Schematic of the set-up for measuring light attenuation over a spectrum of 600-1000nm including the aligning mechanism (left). The schematic was adapted from (22), green lines highlight electrical connection whereas blue lines optical ones. The alignment process of the fiber axes is shown for fibers with similar (red) and different (blue) diameters and their respective output at different locations during scanning correlating to the performed fit (right).