ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,473, issued on Feb. 24, was assigned to SEIKO EPSON Corp. (Japan).
"Laser interferometer" was invented by Kohei Yamada (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A laser interferometer includes: a light source configured to emit laser light; an optical modulator including a vibrator driven by a drive signal and configured to superimpose a modulation signal on the laser light; a photodetector configured to receive the laser light including the modulation signal and a sample signal derived from an object and output a light receiving signal; a calculator configured to demodulate the sample signal from the light receiving signal bas...