Since 2007, many diffraction gratings have been distributed worlwide, in more than 25 countries. Two models of diffraction gratings are circulating: one as a slide frame, the other one as an adhesive cap for mobile phone. To better visualize the distribution of them, each grating has been geolocalized from the zip code used for sending.
Order your diffraction grating slide and go to the hunt of UFO’s spectrums. Several methods are available to get yours at low cost. The diffraction grating remains as free.
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Based on our experience on the design of the first version of lens cap for mobile phones, we have sought to remove
Sorry, this entry is only available in Français.
