... 通用类型系统 allgemeines Typsystem 透镜系统 Linsensystem 外部源系统 externes Quellsystem ...
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当透镜系统旋转时，光点画出一个圆形轨迹。
The spot of light describes a circular path when the lens assembly is rotated .
设想我们有某种透镜系统，它对一个扩展物体成象。
Imagine that we have some sort of Lens system which forms an image of an extended object.
密封激光包在恶劣环境下可靠运行，激光输出采用内部透镜系统校准。
As before, the laser package is hermetically sealed for reliable operation in adverse environments and the laser output is collimated using an internal lens system.
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