Question

Zemax surface curvature in X and Y direction calculation ?

  • 10 July 2024
  • 1 reply
  • 35 views

Hi Community,

I am confused by the way Zemax calculate surface curvature in X and Y direction. Consider a very simple case: a sphere.Take  latitude direction as X axis and  longitude direction as Y axis, and pick up 3 points P1,P2,P3 in different latitude circle. You will see each latitude circle has different circular radius. SO I will expect surface cross section curvature analysis (or use SCUR operand for data 4/5) will give different curvature values in these positions,

BUT OpticsStudio always give same value constant equal to sphere curvature. Same true for use SCUR(data 4/5 for XY direction, even  data 0/1 for tan/sag direction).

So what happened here? Did I miss something simple?  thanks

Eric Yu

 

 


1 reply

 

The knowledge base article ‘Understanding the geometry in OpticStudio Curvature Cross-Section analysis’ authored by Shawn Gay doesn’t explain this discrepancy (I mean sphere case above).

 

Eric

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