POF (Plastic Optical Fiber) is the main part of an optical fiber lighting system, and its function is to transmit light to a predetermined place. POF can be divided into two types: end light-emitting and whole-body light-emitting. The former means that the light beam is transmitted to the end, or the tail light is used for lighting; the latter itself is a luminous body, forming a flexible light column. The end-emitting optical fiber is usually made of PMMA, while the material of the whole body emitting POF can be divided into PMMA and polymer.