ALEXANDRIA, Va., June 19 -- United States Patent no. 12,332,168, issued on June 17, was assigned to Photothermal Spectroscopy Corp. (Santa Barbara, Calif.).

"Method and apparatus for improved composite multi-wavelength photothermal infrared imaging" was invented by Craig Prater (Santa Barbara, Calif.) and Kevin Kjoller (Santa Barbara, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods described herein provide improvements on composite infrared absorption imaging. Scanning patterns described herein reduce erroneous measurements caused by thermal drift, as well as optical interference that occurs between light scattering from the top surface of the sample and light scattering from an underlying subs...