US Patent Issued to CANON on Oct. 6 for "Diffractive optical element and method of manufacturing diffractive optical element" (Japanese Inventor)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,754,355, issued on Oct. 6, was assigned to CANON K.K. (Tokyo).

"Diffractive optical element and method of manufacturing diffractive optical element" was invented by Kouichi Yonetani (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A diffractive optical element includes a first resin portion having a first diffraction grating and made of a first resin material, a second resin portion having a second diffraction grating formed to cover the first diffraction grating and made of a second resin material, and a transparent inorganic film formed on an optically effective surface, which is an interface between the first diffraction grating and the...