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Compound Parabolic Concentrator question

Compound Parabolic Concentrator question

(OP)
Hello,
I have a question related to CPCs that perhaps someone can help me with. Can they be arranged back to back to allow for light to be focused from an aperture of 100mm into a aperture of 5mm. I understand a single cpc has a typical entry to exit aperture ratio of about 4-5x to 1. I'm hoping to find a solution with a ratio closer to 20 to 1. I'm an architect, not an engineer (sorry folks) developing a light harvesting system that transfers light via fiber optic cables. CPCs seem to be the only conceptual solution that would allow for some movement of the light source (sun) without having to resort to tracking systems. Thanks for your help!

Chris

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