F4,BaS04内涂层可选,漫反射均匀,效率高;化学性质更稳定,使用寿命生。直径依据客户要求可选,特殊直径规格可定做。Integrating SphereWith uniformity reflection, high efficiency, stable chemical property and long life, F4 and BaS04internal coating are option. The diameter is option. Special specification can be customized.