coma aberration

基本解释

For large primary coma aberration, interference fringe presents.
大的初级彗差使焦平面出现干涉条纹。
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It is difficult to determine exactly an geometrical value of coma aberration by method of star-testing.
直接用星点法不易准确测定慧差的几何值。
As a result of shape change and groove density variation, it not only improves the focusing condition, but also affectes higher order aberrations such as coma aberration of the imaging system.
由于光栅面形及其线密度的变化，不仅对光栅成像的聚焦特性有所改善，对彗差等高阶次像差的影响也是不可忽略的。