Glass Fibre
Glass fibre is most commonly used in its end-emitting configuration to transmit light from the light source to individual points of delivery.
The harnesses are made up of tails which contain many fine glass fibres sheathed in a black coloured low smoke material. The ends are finished with crimp terminations for the smallest diameters and with brass or stainless steel ferrules for larger diameters. Ferrules allow end fittings to be attached to finish the tail and with lenses to control the focus. Because the glass fibres in each tail are very fine they can be mixed-up in the common end (known as randomising) to give a more even light output between individual ends. Glass end emitting fibre is the preferred option over polymer for lengths up to about 10m. With longer lengths a colour shift can occur. Cracked glass side glow is also available as an effect fibre.
