根据单狭缝衍射原理，提出了一种测量透镜单色焦距的新方法。
A new method of measuring the monochrome focal length of lens is given from the single slit diffraction principle.
在单色光、小物条件下，球差是引起薄凸透镜焦距的测量误差的主要因素。
Under conditions of monochromatic light and a small object, the spherical aberration was the main factor which led to measuring error of focus of thin convex lens.
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