The structure of the film system was designed as PET(polyester) / Cr / polyurethane / Al according to the optics interference theory of multiplayer.

• 根据多层复合膜光干涉原理设计和计算了光变色薄膜,所确定的薄膜膜系结构为PET(聚酯薄膜)/Cr/介质/Al。 介质是有机高聚物聚氨酯。