US Patent Issued to SEIKO EPSON on Feb. 3 for "Laser interferometer" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,812, issued on Feb. 3, was assigned to SEIKO EPSON Corp. (Japan).

"Laser interferometer" was invented by Kohei Yamada (Shiojiri, Japan) and Atsushi Matsuo (Shiojiri, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A laser interferometer includes: a laser light source configured to emit laser light toward an object; an optical modulator including a vibrator configured to modulate the laser light using the vibrator and superimpose a modulation signal on the laser light; a photodetector configured to receive the laser light including a sample signal derived from the object and the modulation signal, and to output a light reception signal; a demodul...