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.

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因此，晶体在投入使用之前，测量它的本征宽度，为单色仪的调试提供依据是非常必要的。

So it's necessary to measure the intrinsic width and the error in the normal direction of the crystals to provide basis for the monochromator alignment.

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在选用合适的紫外材料激发后，采用双光栅单色仪和紫外传感器进行测量。

After the excitation scheme of suitable ultraviolet material is selected, the ultraviolet spectrum is measured with the dual-grating monochromator and ultraviolet sensor.

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