US Patent Issued to HAMAMATSU PHOTONICS on Jan. 27 for "Optical device" (Japanese Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,628, issued on Jan. 27, was assigned to HAMAMATSU PHOTONICS K.K. (Hamamatsu, Japan).

"Optical device" was invented by Tsubasa Watanabe (Hamamatsu, Japan), Hiroto Sakai (Hamamatsu, Japan) and Yasushi Ohbayashi (Hamamatsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical apparatus includes an optical system for outputting parallel light, and an angle filter disposed on an optical path of the parallel light output from the optical system. The angle filter includes a dielectric multilayer film in which dielectric layers having a first refractive index n1 and dielectric layers having a second refractive index n2 lower than the first refrac...