ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,976, issued on May 20.
"Optical system using enhanced static fringe capture" was invented by Curtis Blake LaPlante (Ottawa), Bruno Machado Trindade (Kanata, Canada) and Eranga Madujith Ukwatta (Toronto).
According to the abstract* released by the U.S. Patent & Trademark Office: "A background subtraction method and tilt stage device for eliminating contaminated or spurious interference patterns by reducing retrace errors. An optical reference surface secured in a pivoting mount coupled to a tilt actuator is configured to angularly displace the pivoting mount and optical reference surface. A microcontroller coupled to the tilt actuator controls the tilt displacement of the tilt act...