ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,859, issued on May 19, was assigned to LEONARDO S.P.A. (Rome).

"Illumination optical device comprising a collimator having low intrinsic noise" was invented by Marco Barilli (Pomezia, Italy), Michele Dami (Pomezia, Italy), Fulvio Grifoni (Pomezia, Italy) and Carlo Pompei (Pomezia, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "The illumination optical device comprises a collimator, a light source, and an aperture. The collimator comprises a primary mirror, a secondary mirror, a tertiary mirror and a quaternary mirror mutually tilted so as to form a collimator optical path extending between the light source and the aperture and formed, in succes...