Laser Retro-Reflector

A replica of a lunar laser retro-reflector.

A retro-reflector (sometimes called a retro-flector or cataphote) is a device or surface that reflects radiation (usually light) back to its source with minimum scattering.

I saw Adam Savage building his own replica and I wanted to know more. I found a paper with some more information including a couple of dimensions. This is my version of the laser retro-reflector. Based on 12.7mm/0.5" reflectors.

Useful links:
Retro-reflector paper
Adam Savage one day builds
Trihedral Retroreflectors