The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2018
Filed:
Mar. 03, 2016
The United States of America, As Represented BY the Secretary of the Navy, Washington, DC (US);
Vinh Q. Nguyen, Fairfax, VA (US);
Mikhail Kotov, Silver Spring, MD (US);
Daniel J. Gibson, Cheverly, MD (US);
Shyam S. Bayya, Ashburn, VA (US);
Jasbinder S. Sanghera, Ashburn, VA (US);
Gryphon A. Drake, Potomac, MD (US);
The United States of America, as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
The present invention provides a method for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.