US Patent Issued to FUJIFILM on July 28 for "Observation optical system and optical apparatus" (Japanese Inventor)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,523, issued on July 28, was assigned to FUJIFILM Corp. (Tokyo).

"Observation optical system and optical apparatus" was invented by Shunsuke Miyagishima (Saitama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An observation optical system includes a display element, and an eyepiece lens disposed on an eyepoint side with respect to the display element. The eyepiece lens includes a first negative lens having strongest negative refractive power among lenses included in the eyepiece lens, a first positive lens disposed adjacent to a display element side of the first negative lens, and a second positive lens disposed closest to the display element ...