This rainbow-making tech could help autonomous vehicles read signs

A new study explains the science behind microscale concave interfaces (MCI) -- structures that reflect light to produce beautiful and potentially useful optical phenomena. Future applications of these effects could include aiding autonomous vehicles in recognizing traffic signs, researchers say. Multiple images, including of a sign created using the material, are available.

source https://www.sciencedaily.com/releases/2021/08/210831155306.htm