US Patent Issued to Honeywell Ltd. Honeywell on Feb. 17 for "Optical communication system using diffraction gratings as a directional filter" (Canadian Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,273, issued on Feb. 17, was assigned to Honeywell Ltd. Honeywell Limitee (Mississauga, Canada).

"Optical communication system using diffraction gratings as a directional filter" was invented by Marc Salsbury (Gloucester, Canada) and Alan Scott (Guelph, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical communication system is provided with a sequence of diffraction gratings interposed between an external signal pathway and both an internal transmitting unit and an internal receiving unit. A plurality of diffraction gratings arranged into the sequence define a reciprocal optical directional filter. The diffraction gratings, transmitting...