US Patent Issued to SEIKO EPSON on Oct. 20 for "Wavelength variable interference filter" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,769,111, issued on Oct. 20, was assigned to SEIKO EPSON Corp. (Tokyo).

"Wavelength variable interference filter" was invented by Kengo Takagi (Matsumoto, Japan) and Tsuyoshi Miyashita (Ina, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wavelength variable interference filter includes a first substrate, a second substrate facing the first substrate, a first reflective film provided on the first substrate, and a second reflective film provided on the second substrate and facing the first reflective film via a gap. The second substrate includes a diaphragm substrate having a uniform thickness in a Z direction and a support substrate bonded to the ...