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提出一些实现分数傅里叶变换的新型的基本光学单元。这些基本单元仅使用一个透镜和一个菲涅耳衍射，给光学设计增加一些新的可选基本类型。对于给定焦距的透镜，它能完成的分数傅里叶变换是Ｌｏｈｍａｎｎ给出的单透镜结构无法实现的。
Some new basic optical units that implement Fractional Fourier Transform are proposed. These basic units use only one lens and one Fresnel diffraction, adding some new basic types of options to optical design. For a given focal length lens, the fractional Fourier transform it can do is unattainable by the single-lens structure given by Lohmann.