ion lens

例句：

1. 1. The electron lens is used to focus light on a small area.
   电子透镜用于将光线聚焦在一个小区域。
2. 2.The photon lens can magnify objects up to several thousand times.
   光子透镜可以将物体放大到几千倍。
3. 3.In the field of optics, ion beam lenses are used for precise focusing and imaging.
   在光学领域，离子束透镜用于精确聚焦和成像。