Sunday, July 17, 2016

[msnhydsl] Dangerous caustics

Most people can recognize that convex lenses and concave mirrors can concentrate sunlight to dangerous intensities, perhaps igniting fires.  However, are there other less famous shapes which can concentrate almost as well?

Inspired by the caustics of a glass cup.  By adjusting both the inner and outer shapes (while still keeping it a surface of revolution), it seems one could conceal lens-like concentrating power from certain angles.

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