ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,921, issued on Jan. 13, was assigned to THALES (Meudon, France).
"Non-rotating elliptical iris diaphragm" was invented by Laurent Montagne (Villeurbanne, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "An iris diaphragm having an optical axis, includes a fixed ring, a mobile ring designed to rotate about the optical axis with respect to the fixed ring and comprising a plurality n of guidance guideways, a plurality of n blades defining an elliptical diaphragm aperture having a major axis (a) and a minor axis (b), each blade being able to pivot with respect to the fixed ring about a respective axis and comprising a respective mobile pin able to ...