ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,623, issued on Jan. 27, was assigned to GOERTEK OPTICAL TECHNOLOGY Co. LTD (Shandong, China).
"Optical system and head mounted display" was invented by Qi Sun (Shandong, China) and Bogang Zhao (Shandong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical system and a head mounted display are disclosed. The optical system comprises: a third lens, a second lens and a first lens arranged successively along a propagation direction of incident light. There are two adjacent Fresnel surfaces in the optical system, and at least one of the Fresnel surfaces has a curved base. The present disclosure provides a solution of short-focus and lightweig...