ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,727,764, issued on Sept. 8, was assigned to TAMRON Co. LTD. (Saitama, Japan).
"Dental caries detection device" was invented by Atsushi Sayama (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tooth of a subject is irradiated with light having a specific polarization direction, and each of two or more polarization components in Raman-scattered light from the tooth is separated by a polarization separation element and detected by a detector. Polarization anisotropy of the Raman-scattered light is obtained from a detection signal of each polarization component, and dental caries in the tooth is detected based on the polarization anisotropy."...