ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,429,191, issued on Sept. 30, was assigned to Schott AG (Mainz, Germany).
"Illumination device" was invented by Volker Hagemann (Mainz, Germany) and Ulrike Stohr (Mainz, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An illumination device includes a light source, a light conversion element with a front side, an optical element, and first and second optical interfaces, wherein (a) an outer surface of the optical element includes a first surface area extending obliquely to the front side, so that secondary light can be decoupled at the second optical interface from the optical element into the surrounding medium in a direction which has a smaller...