UV mirror and is called the UV filter, namely, UltraViolet.Usually colorless, transparent, but some, because of the added coating under a certain Angle To see a purple or purple is present.Many people buy UV lens to protect the delicate lens coating, actually this is only a subsidiary function.UV mirror can abate caused by ultraviolet (UV) light blue.For digital camera, at the same time can also exclude the interference of uv CCD, help to improve the clarity and color effect.