Uv filter: Uv curve quartz plate(with membrane) Uv reflector glass, uv curve filter, filter mirror, reflector plate Type : curve or flat Coat or none coat, with or without membrane. Both cold and hot mirrors are used for effectively dispersing the heat (Infrared lights from the UV Lamp) away and to collect the UV rays at the same time for fast and high-quality curing without distortion the object to be cured.