The structure and properties of two such monocentric systems are discussed.
介绍了两种典型同心光学系统的结构和特性。
If a monocentric system existed for which an incident collimated beam emerged as exactly collimated, then the system would give geometrically perfect imaging of any point in space.
当入射光束与出射光束平行时，单色同心光学系统空间任一点成几何理想像。
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