[讨论]扩展多项式（Extended Polynomial）表面类型的用法 [复制链接]

将一个面的表面类型设为扩展多项式（Extended Polynomial）后，extra data编辑框里的第二项norm radius是什么呢？应该怎么设置呢？ gq/ePSa  
zemax manual里的说明是“Normalization radius. All ray-intercept points are divided by this number to determine the x and y coordinates for polynomial evaluation.”，但是没看懂，请问大家怎么理解？ 6uCk0 B|  
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描述:zemax manual里的说明1

图片:exp1.jpg

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描述:zemax manual里的说明2

图片:exp2.jpg

  

generally this should be the semi-diameter of the surface. What "normalized" implies that the maximum is scaled to 1 and the rest of the cooridnates are calculated as a ratio.. This is similar to Normalized Coordinates used for pupil interception. See the Normalized Field/Pupil Coorindates in the user manual. XZep7d}  
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Hope this helps ..

归一化半径，比如你要拟合镜子半径为70mm，拟合时通常在单位圆内进行，拟合前要把数据归一化，即x,y除以70。拟合后，拟合系数输入对应系数项，而Normalization radius项呢就应该设置为70.

不太懂呵呵

理解不能 求指點

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