Thanks Antiphon
As a matter of fact, I am looking to build in the 3.5 - 4 metre diameter range.
How would an ideal section work in that case? Again, would it be possible to use an array of lenses to substitute the truncated cone? Refraction over Reflection ?
Which would be more...
Am looking to build a solar tunnel that would not only redirect solar visible light radiation, but also heat, with minimum losses. Basically need to deflect angle of incident radiation by around 30 degrees.
Am considering an inverted truncated cone design, with a polished inner surface...