ALEXANDRIA, Va., March 31 -- United States Patent no. 12,591,203, issued on March 31, was assigned to FUJIFILM Corp. (Tokyo).

"Holography apparatus and cell evaluation method" was invented by Hideki Yasuda (Kanagawa, Japan) and Ryusuke Osaki (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A holography apparatus 10 includes an optical system 200 that forms an interference image due to interference between object light L1 and reference light L2. The optical system 200 includes a retarder 30 that is disposed on an optical path of the object light or the reference light, and a rotation mechanism 31 that rotates the retarder 30 with an optical axis of the object light L1 or the reference light L2 ...