All components of the monochromator were laid on the Rowland circle. The position of the exit slit was changed to obtain the corresponding monochromatic light in the exit slit of the monochromator.

单色仪的所有组件都放置在罗兰圆的圆周上，改变出射狭缝在罗兰圆上的位置，在单色仪的出射狭缝处就可以得到相应波长的单色光。

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All components of the monochromator were laid on the Rowland circle. The position of the exit slit was changed to obtain the corresponding monochromatic light in the exit slit of the monochromator.

单色仪的所有组件都放置在罗兰圆的圆周上，改变出射狭缝在罗兰圆上的位置，在单色仪的出射狭缝处就可以得到相应波长的单色光。

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