US Patent Issued to Sony Group on Oct. 14 for "Optical element, illumination apparatus, and projective display apparatus" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,443,098, issued on Oct. 14, was assigned to Sony Group Corp. (Tokyo).

"Optical element, illumination apparatus, and projective display apparatus" was invented by Toshifumi Yasui (Kanagawa, Japan) and Yusuke Kono (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An illumination apparatus includes a light source, an optical member, and an integrator. The optical member is rotatable around a rotation axis AR. A planar shape of the optical member is annular around the rotation axis AR. A first surface of the optical member is provided with a recessed and protruding portion. Multiple recessed and protruding structure units are consecutively for...