ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,062, issued on Nov. 25, was assigned to BAE Systems PLC (London).
"Active modulating element detection" was invented by Mark Edgar Bray (Chelmsford, Great Britain) and Jason John Lepley (Chelmsford, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and apparatus for detecting a modulating element of an object in a scene are described in which an element in a scene is illuminated with a modulated light source. A signal is obtained from an optical detector based on light received from the illuminated element. An intermediate frequency signal is detected from the signal obtained from the optical detector, the intermediate frequency s...