ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,448, issued on May 27, was assigned to SEIKO EPSON Corp. (Japan).
"Laser interferometer" was invented by Kohei Yamada (Shiojiri, Japan) and Nobuhito Hayashi (Chino, 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; a light shielding element having an opening through which the laser light passes; an optical modulator configured to modulate the laser light into reference light having a different frequency; and a light receiving element configured to receive object light generated by reflecting the laser light by an object to be measured and the reference light and...