POF (Plastic Optical Fiber) is a high refractive index polymer materials for low refractive index polymer core and cladding material consisting of fiber. AS quartz optical fiber, POF is the use of plastic optical fiber transmission principle of total reflection of light, medium density fiber core is light, pack light layer is denser medium, so as long as a light injected into the right angle, this beam of light will be in have been conducting an internal total reflection optical fiber to transmit to the other side.