US Patent Issued to CHANGKANG CHEMICAL on Sept. 1 for "Optical filter" (South Korean Inventor)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,724,187, issued on Sept. 1, was assigned to CHANGKANG CHEMICAL Co. LTD. (Ansan-si, South Korea).

"Optical filter" was invented by Young Tae Heo (Ansan-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "In the present application, a sharp visible light transmission band can be obtained while efficiently and accurately blocking ultraviolet light near the short-wavelength visible light region and infrared light near the long-wavelength visible light region, and the ripple phenomenon can be minimized regardless of the incident angle. It is possible to provide an optical filter capable of obtaining high visible light transmittance while securing ...