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Old Aug 24th 2014, 08:35 AM   #1
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Join Date: Aug 2014
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What is local linear increase?

Hello!
I need to find a local linear increase in the field of the lens.

I have Listing of Field Curvature Data.

It contains vectors of - Y height, Tan Shift, Sag Shift, Real Height, Ref. Height, Distortion.

I can not understand how these data get what I need.





Local linear increase in the field of the lens is the ratio of the size of a small object (in the limit of the size tends to zero) located at any distance from the lens center (in this case, the axis Y) to its size in the middle of the field.





(Real Height/Ref. Height) ratio is close to Distortion, but not equal, may be it is answer?
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