ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,941, issued on Nov. 3, was assigned to Carl Zeiss Jena GmbH (Jena, Germany).
"Compact photometric apparatus for reconstructing a hologram" was invented by Siemen Kuhl (Jena, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The lighting device comprises an optical block having a coupling portion with a coupling face which is arranged to couple light into the optical block and a waveguide portion extending away from the coupling portion and designed to guide the light by multiple reflection between an upper face and a lower face of the waveguide portion. The optical block also comprises a holographical optical element that is formed in the wavegu...