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离轴全息透镜可以把入射光波变为入射波的傅里叶变换与一个离轴引起的附加位相因子的乘积，本文说明如何通过选择记录和再现时光路的参数。来减小附加位相的影响，从而用离轴全息透镜实现准傅里叶变换。
Off-axis holographic lenses can transform incident light into incident waves by multiplying the Fourier transform with an off-axis additional phase factor. This article shows how to choose the parameters of the optical path for recording and reproduction. To reduce the influence of the additional phase, thereby achieving a quasi-fourier transform with an off-axis holographic lens.