Here is more background from the patent literature: https://patents.google.com/patent/US8459807B2/en https://patents.google.com/patent/US8459807B2/en The guy

Here is more background from the patent literature: https://patents.google.com/patent/US8459807B2/en https://patents.google.com/patent/US8459807B2/en The guy that discovered it was attempting to laser convert Scotchlite and noticed a weird effect of the light near the cut zone that they eventually figured out.