Faceted ellipsoid mirror

[kittski]

Cool stuff

http://n-e-r-v-o-u-s.com/blog/?p=3343

[paulw]

Wow. trippy. They used to (don’t know if they still do) make mirrors like that as beam combiners for seriously high-powered lasers. Each sub-beam was already collimated, so the mirror thingy just had to assemble them all and point them in the right direction, without focusing or defocusing.

[jbv]

So that’s what they used…