So this is really cool and useful, but it's important to keep in mind that since this is a diffractive structure, it probably only works with coherent light (wh

So this is really cool and useful, but it's important to keep in mind that since this is a diffractive structure, it probably only works with coherent light (what you get from a laser.) Most normal light sources produce incoherent light, and that tends to not work so well with complex diffractive structures.