US Patent Issued to FUJIFILM on June 23 for "Observation optical system and optical apparatus" (Japanese Inventor)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,634, issued on June 23, was assigned to FUJIFILM Corp. (Tokyo).

"Observation optical system and optical apparatus" was invented by Hiroki Saito (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 of the display element. The eyepiece lens includes a first lens having positive optical power, a second lens having negative optical power, and a third lens consecutively in order from closest to a display element side to the eyepoint side. In a case where a half value of a longest diameter of a display region in the display element is denot...