US Patent Issued to Essilor International on March 17 for "Optical article having a multilayered antireflective coating on its rear main face" (Singaporean Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,509, issued on March 17, was assigned to Essilor International (Charenton-le-Pont, France).

"Optical article having a multilayered antireflective coating on its rear main face" was invented by Xingzhao Ding (Singapore), Ker Chin Ang (Singapore) and Andrew Pelayo (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "This invention relates to an ophthalmic lens comprising a substrate with a front main face and with a rear main face, said rear main face being coated with a multilayered antireflective coating comprising a stack of at least two layers having a refractive index higher than or equal 1.55, defined as "HI layer" and at least two layers ...