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20世纪70年代,F.Mezei[1]提出了超镜的概念,推导了多层膜超镜极化器层厚的公式,并首次测量了Fe-Ag超镜的反射率[2]。超镜极化器具有反射率高、临界角大（可为大然镍全反射临界角的2～3倍）等优点,在极化中子散射实验中受到人们的青睐。随着镀膜技术的发展,超镜极化器已在实验中得到了广泛的应用。 根据中国先进研究堆（CARR）上中子反射谱仪对超镜极化器的要求,确定了中子极化器采用FeCo-Si透射超镜,磁层、非磁层分别采用FeCo合金和Si,衬底采用单晶Si。根据F.Mezei
In the 1970s, F. Mezei [1] proposed the concept of hyper-mirror, deduced the formula of layer thickness of super-mirror polarizer, and measured the reflectivity of Fe-Ag supermirror for the first time [2]. The hyper-mirror polarizer has the advantages of high reflectivity and large critical angle (which may be 2 ~ 3 times of the critical angle of total reflection of the macronickel), and is favored by people in the polarized neutron scattering experiment. With the development of coating technology, hyper-mirror polarizer has been widely used in experiments. According to the requirements of the super-mirror polarizer on the CARR neutron reflection spectrometer, it is determined that the neutron polarizer adopts the FeCo-Si transmission super-mirror, the magnetic layer and the non-magnetic layer are respectively FeCo alloy and Si , The substrate using single crystal Si. According to F. Mezei