Using a knife edge to measure the MTF of optical system is a basic way. The paper discusses the influence of slit edge error on MTF by building a mathematical model.
刀口法是测量光学系统的传递函数一种基本方法，通过对刀口边缘误差建立数学模型，讨论刀口误差对光学传递函数测量精度的影响。
In Fraunhofer diffraction of a slit, the slit widths obtained with the fringes produced by polarized light whose vibration is parallel or perpendicular to the slit edge are different.
在狭缝的夫琅和费衍射中，由振动平行和垂直于缝边的偏振光的衍射条纹得到的缝宽值不同。
Thin edge(about 1mm thickness)slitting with automatic and manual grindstone grinding to keep edge sharp and make slit paper smooth and tidy.
采用薄刀分切（厚度仅为1毫米）、设有自动、手动砂轮磨削，保持刀刃锋利，使分切的纸板平滑整齐；
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