ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,379,584, issued on Aug. 5, 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 arranged on an eyepoint side of the display element. The eyepiece lens consists of a first lens having positive refractive power, a second lens having negative refractive power, and a rear side lens group including two or more lenses consecutively in order from a side closest to the display element to the eyepoint side. In a case where a half value of a longest di...