Based on aberration theory, a way of designing beam expander with aspheric surface is introduced.
本文根据像差理论，叙述了非球面扩束器的设计方法。
Galilean beam expander with spherical lens is widely used in laser systems, but it has a lot of deficiency.
在激光系统中，伽里略球面透镜扩束器已得到广泛地应用，但是，它有许多不足之处。
A Galilean beam expander with spherical lens is widely used in laser systems, but it has a lot of deficiency.
在激光系统中，伽里略球面透镜扩束器已得到广泛地应用，但是，它有许多不足之处。
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