Figure 5
Full color image writing by stacking gratings. (a) A photograph of a Rainbow Lorikeet written on a DR1g film surface with 120 \(\times \) 80 pixels. The total size of the written area is 12 mm \(\times \) 8 mm, and the writing time was 9 h. The image was taken in direct sunlight, by capturing the first reflected diffraction order with a camera. Each pixel of the image contains three gratings for reflecting red, green, and blue light towards the camera. (b) Source image for patterning. Original photograph by Peter Heeling, licensed under the CC0 license40. (c–e) Surface profiles of three randomly selected pixels imaged with the DHM, consisting of a mixture of three grating periods with the measured grating heights shown in (f–g).
