Composite refractive index ITO film

The utility model relates to the vacuum film growth field, in particular to a complex refractive index ITO film. The complex refractive index ITO film comprises a substrate, and is characterized in that the substrate is attached with a layer of lower ITO film layer, the lower ITO film layer is attached with a layer of upper ITO film layer, and the upper ITO film layer and the lower ITO film layer have different refractive indexes. Through the arrangement of different thicknesses and the refractive index differences, the complex refractive index ITO film can adapt to the requirements of optical performance under different working conditions.