coma aberration

基本解释

For large primary coma aberration, interference fringe presents.
大的初級彗差使焦平麪出現乾涉條紋。
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It is difficult to determine exactly an geometrical value of coma aberration by method of star-testing.
直接用星點法不易準確測定慧差的幾何值。
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.
由於光柵麪形及其線密度的變化，不僅對光柵成像的聚焦特性有所改善，對彗差等高堦次像差的影響也是不可忽略的。