“…Some man-made systems utilize solutions, which are probably not applied in animal vision. Amongst them are coded aperture imaging devices, which can be regarded as extension of pinhole cameras [16,17], and diffraction optics, like lenses based on Fresnel zones, used in synchrotron driven X-ray microscopy, or in microdiffraction to focus the beam [18,19]. Some other devices, like optical waveguides, or X-ray capillaries, are nowadays commonly applied in optics and detector technology.…”