ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,238,449, issued on Feb. 25.
"Infrared imager and related systems" was invented by James I. Scholtz (New York).
According to the abstract* released by the U.S. Patent & Trademark Office: "An infrared imaging apparatus having thin-film spatial filters in a stacked array to filter and collate light generated internally by the infrared imaging apparatus such that the light generated impacts a detection area of the imaging apparatus at or near a critical angle. The index of refraction of the detection area being subject to change when irradiated with infrared light such that the amount of light generated internally and reflected to a light detector attached to the imaging apparatus varies...