I couldn't find any photograph or diagram of the device that generate the numbers in the web page. I worked with optic tables, and I'm just curious and want more details.<p>I only found the preprint: <a href="http://arxiv.org/abs/1107.4438" rel="nofollow">http://arxiv.org/abs/1107.4438</a> , so they use an 1550 nm infrared laser. The preprint has a diagram, but no photographs.