These electroformed hollow waveguides are custom built and therefore can have tapers or bends (see Photo) that allow designers great latitude in transporting infrared light from “here to there.”
A new application that customization permits, is a square or hexagonal cross-section that takes a collimated beam entering the light pipe and converts it to a homogenized beam at the exit. Caption for photo: “A laser beam transits a loop that was originally ‘just a doodle,’”
“A laser beam transits a loop that was originally ‘just a doodle,’”The beam from a green laser make the circular path through a Laser Gold lined hollow waveguide. More impressive since gold is less than 50% reflective at these wavelengths.