US Patent Issued to YEJIA OPTICAL TECHNOLOGY (GUANGDONG) on Feb. 25 for "Large-aperture four-piece optical lens" (Chinese Inventors)

ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,235,517, issued on Feb. 25, was assigned to YEJIA OPTICAL TECHNOLOGY (GUANGDONG) Corp. (Dongguan, China).

"Large-aperture four-piece optical lens" was invented by Cheng Jiang (Dongguan, China), Jun She (Dongguan, China) and Jixue Nan (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A large-aperture four-piece optical lens includes a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with positive focal power which are sequentially arranged. A back of the fourth lens is provided with an image surface, an aperture diaphragm is arranged at a front end of the...