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:
Mar. 22, 2011
Filed:
Feb. 23, 2007
Vincent Reymond, Antony, FR;
Estelle Martin, Saint-Denis, FR;
Vincent Reymond, Antony, FR;
Estelle Martin, Saint-Denis, FR;
Saint-Gobain Glass France, Courbevoie, FR;
Abstract
Transparent especially glass, substrate () having at least on one of its sides an antireflection coating made from a stack (A) of thin dielectric layers of alternating high and low refractive indices, characterized in that the stack comprises, in succession: a high-index first film () having a refractive index nbetween 1.8 and 2.3 and a geometrical thickness eof between 10 and 25 nm; a low-index second film () with a refractive index nof between 1.40 and 1.55 and a geometrical thickness eof between 20 and 50 nm; a high-index third film () with a refractive index nof between 1.8 and 2.3 and a geometrical thickness nof between 110 and 150 nm; and a low-index fourth film () with a refractive index nof between 1.40 and 1.55 and a geometrical thickness eof between 60 and 95 nm, the algebraic sum of the geometrical thickness e+ebeing between 125 and 160 nm.