The OTF (Optical Transfer Function) of an optical system can be evaluated by the Fourier Transform of the first derivative of the optical image of an knife-edge (object).
对光学系统输出刀口像的一阶导数做傅里叶变换，可以得到该系统的光学传递函数（OTF）。
The most complete measures of image quality for an optical system were its point spread function (PSF) and its optical transfer function (OTF).
全面测量光学系统像质的是它的点扩散函数(PSF)或光学传递函数(otf)。
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