US Patent Issued to Yokogawa Electric on May 26 for "Colorimeter and chromaticity measurement method" (Japanese Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,331, issued on May 26, was assigned to Yokogawa Electric Corp. (Tokyo).

"Colorimeter and chromaticity measurement method" was invented by Ryutaro Maki (Musashino, Japan) and Kazufumi Nishida (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A colorimeter 1 that measures a chromaticity of a measured object A comprises: a first light source unit 11 that emits first irradiation light having a first spectrum S1; a second light source unit 12 that emits second irradiation light having a second spectrum S2 different from the first spectrum S1; an integrating sphere 61 that has irradiation light including the first irradiation light and the s...