https://www.sciencedaily.com/releases/2017/10/171006142203.htm
Left: Light from a laser pointer is shaped into a wide and stable output using a beam-shaping diffuser. A carefully designed pattern is precisely molded into plastic polymers or directly into a glass substrate, creating micro-structures on the surface of the diffuser (inset; image credit: RPC Photonics). Right: The diffuser installed at the 3.5m telescope at Apache Point Observatory.
