在ZEMAX中，物理光学传播的功能里面空间余弦矩阵是怎么得到的，物理光学传播中光束的Y轴是怎么定义的，或者“镜头编辑器→物理光学→采用X轴参考”是什么意思？
Use X-axis Reference
In ZEMAX, how is the space cosine matrix obtained in the function of physical optical propagation, how is the Y-axis of the beam in physical optical propagation defined, or what does "lens editor → physical optics → Use X-axis Reference " mean?
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