大家好，
我试着去理解文献和ZEMAX对于主光线的定义
发现，SPIE 和亚利桑那大学对于主光线的定义是通过光阑中心，而ZEMAX是定义成通过入瞳中心，这给我的使用带来了困惑，请不吝解释。
Userlevel 1
Hello Steve,
The Chief ray defines the location of the entrance pupil at the crossing with the optical axis….It also plays a key role in defining the image and object ratio. I think all the definitions are valid just different wording.
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