And then the ring light source is transformed to a new non-diffracting beam with different parameters in terms of the second lens which has different focus.

 
  • 无衍射光首先被望远系统的第一块透镜变换为一个环光源,第二块不同焦距的透镜再将该环光源变换为一个不同参数的新无衍射光。
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