ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,695, issued on March 18, was assigned to Carl Zeiss AG (Oberkochen, Germany).
"Diffractive optical element, method for designing an efficiency-achromatized diffractive structure, and method for producing an efficiency-achromatized diffractive element" was invented by Daniel Werdehausen (Jena, Germany) and Manuel Decker (Jena, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a diffractive optical element with a spatial variation in the refractive index, wherein a sequence of adjacent sections, which form a diffractive structure, is formed by the spatial variation in the refractive index, within which sections the refra...