US Patent Issued to SEIKO EPSON on Sept. 1 for "Balanced heterodyne laser interferometer with optical axis shift" (Japanese Inventor)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,723,864, issued on Sept. 1, was assigned to SEIKO EPSON Corp. (Japan).

"Balanced heterodyne laser interferometer with optical axis shift" was invented by Jun Kitagawa (Matsumoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A laser interferometer includes a laser light source, a first light splitter splitting the laser light into first and second split lights, an optical modulator modulating the first split light into reference light, a second light splitter reflecting part of interference light to generate third split light and transmitting the other part of the interference light to generate fourth split light, and first and second light recei...