US Patent Issued to NTT on March 17 for "Wavelength tunable optical filter" (Japanese Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,520, issued on March 17, was assigned to NTT INC. (Tokyo).

"Wavelength tunable optical filter" was invented by Yurina Tanaka (Tokyo), Takashi Sakamoto (Tokyo), Yuichi Akage (Tokyo) and Soichi Oka (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wavelength-tunable optical filter includes a plate-like first component, a plate-like second component, a first reflective film, and a second reflective film. The wavelength-tunable optical filter also includes a first transparent electrode and a second transparent electrode that serve as a voltage applying part that applies a voltage in the thickness direction of the first component, and as a charge ...