The authorship of intensive use of diffraction gratings to take UFO pictures does not go to Claude Poher (1976) but to the U.S. Air Force in 1953…! Read the excerpt “How to Expose Flying Saucers” from the Popular Science review issued in January 1953.
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Sorry, this entry is only available in Français.
Fifty diffraction gratings are about to be delivered to Ukraine. A warm thank to the private groups from Eastern Europe who realized the importance of these free, easy to use small devices.
After a month spent going back and forth with a Professional 3D Printing Society, and some modifications in order to decipher as
