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:
Sep. 02, 2003
Filed:
Feb. 26, 2001
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
A method for shifting the absorption peak wavelength in the wavelength range 900-1600 nm of an infrared radiation absorbing glass from less than 1100 nm to 1100 nm or longer without substantially changing the tint of the glass, comprising the step of irradiating with ultraviolet light of 400 nm or shorter at an energy density of 1.0×10 J/m /hr or more to increase the content of FeO in the irradiated glass by reducing Fe (III) to Fe (II), the ultraviolet light irradiated glass thereby comprising 0.02 wt. % or more FeO in terms of Fe O . The glass to be irradiated comprises, in % by weight: 65 to 80% SiO , 0 to 5% Al O , 0 to 10% MgO, 5 to 15% CaO, 10 to 18% Na O, 0 to 5% K O, 5 to 15% MgO+CaO, 10 to 20% Na O+K O, and 0 to 5% B O ; 0.02% or more total iron oxide (T-Fe O ) in terms of Fe O , 0 to 2.0% CeO , 0 to 1.0% TiO , 0 to 0.005% CoO, and 0 to 0.005% Se.