It is hard to design for beam expander with high power and wide aperture required, because it is shorten length, larger aperture, as well as on axis and off axis aberration must be corrected properly.

高倍率及大孔径扩束器要求筒长短、口径大、轴上和轴外的像差都要很好地校正，所以光学系统的设计是非常困难的。

youdao

Along with a great deal of use of power electronic technology in power system, the aberration of voltage and current wave become more and more severe.

电力电子技术在电力系统中的大量运用，使电压、电流波形畸变越来越严重。

youdao

Objective: To analyze the aberration properties of contact lens and its central back vertex power measurement.

目的：探讨接触镜的球差特征以及后顶焦距测量的实质。

youdao

It's too soon to tell whether the Mets' recent power surge is a sign of things to come or an aberration.

WSJ: Citi's Shorter Fence Finally Paying Off