ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,950, issued on Sept. 8, was assigned to HOCHSCHULE TRIER (Trier, Germany).
"Double-mirror shear interferometer" was invented by Christopher Petry (Trier Zewen, Germany) and Michael Schuth (Riol, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A measuring arrangement is provided for non-destructive interferometric measurement of an object surface. Light reflected from the surface enters the measuring arrangement as an incoming beam and passes through a diaphragm having an aperture, causing diffraction. The diffracted beam is directed to a mirror arrangement having two mirrors that split and deflect the beam into two partial beams. One of the m...