Change of the spatial distribution of a beam of radiation when it is deviated in many directions by a surface or by a medium, without change of frequency of its monochromatic components.
光束被某一表面或介质改变为多种方向，而不改变其单色光的频率时，所发生的空间光分布的改变。
Comparison of the focusing results of a hot atomic beam with a monochromatic cold atomic beam shows that the main factor affecting the imaging quality of the magnetic lens is chromatic aberration.
在比较了热原子束和单色冷原子束的会聚效果后得出结论：影响它成像的主要因素是色差。
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