Small lens diffraction effects

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Small lens diffraction effects
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• Assume, edge is n-2.8
• Between 7 and 8layers should minimize diffractive
  effects, assuming we have what we designed

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• Nothing wrong with NIM sims.
• Tweak paramters untill we find the closest
  to what our lens likely really is.
• Edge diffraction in small (lt50l) lenses is
  dominant over geometric optics (interesting topic
  for its own paper)