ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,699,256, issued on Aug. 4, was assigned to Nippon Electric Glass Co. Ltd. (Shiga, Japan).
"Infrared imaging lens and infrared camera" was invented by Yoshimasa Matsushita (Otsu, Japan), Fumio Sato (Otsu, Japan) and Nobuo Hori (Higashimatsuyama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An infrared imaging lens (1) includes a plurality of lenses (L1 to L3) which are disposed in respective positions, the plurality of lenses each being made of glass having a refractive index of 2.8 to 4.0 measured at a wavelength of 10 micro metre, the infrared imaging lens having an image circle having a diameter which is 0.7 times to 1.3 times a focal length of...