Pauly, MarkKiser, ThomasPauly, MarkKiser, Thomas2017-05-242017-05-242017-05-242014https://infoscience.epfl.ch/handle/20.500.14299/137604A method and apparatus for producing a reflective or refractive surface that reflects or refracts light shined thereon and reproduces on a screen a desired greyscale intensity image on which the reflective or refractive surface is based and a corresponding apparatus, wherein the method permits a reproduction of a reference grayscale image with adjustable precision.patentES2970107HUE064993PL2711745RS65105PT2711745DK2711745EP2711745US9576553EP2711745EP2711745US201407115547073279