ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,359, issued on Sept. 23, was assigned to HERAEUS QUARTZ NORTH AMERICA LLC (Bulford, Ga.) and HERAEUS QUARZGLAS GMBH & Co. KG (Hanau, Germany).
"Tomographic refractive index profile evaluation of non-symmetrical glass fiber preforms and fibers themselves" was invented by Maximilian Schmitt (Buford, Ga.) and Carl Ponader (Buford, Ga.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for determining the refractive index profile of a preform when the RIP is not substantially symmetrical. (i) The preform is scanned, starting with a first projection angle, and raw data are created representing the object through measured data. (ii) Optionally, the ...