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:
Aug. 02, 2005
Filed:
Nov. 17, 2000
Laurent Joret, Paris, FR;
Anne Durandeau, Paris, FR;
Norbert Huhn, Herzogenrath, DE;
Olaf Stahlschmidt, Aachen, DE;
Ulrich Billert, Aachen, DE;
Laurent Joret, Paris, FR;
Anne Durandeau, Paris, FR;
Norbert Huhn, Herzogenrath, DE;
Olaf Stahlschmidt, Aachen, DE;
Ulrich Billert, Aachen, DE;
Saint-Gobain Glass France, Courbevoie, FR;
Abstract
A transparent substrate including an antireflection coating, made from a stack of thin layers of dielectric material having alternately high and low refractive indices. This stack includes a high-index first layer having a refractive index n, of between 1.8 and 2.2 and a geometrical thickness eof between 5 and 50 nm, a low-index second layer having a refractive index nof between 1.35 and 1.65 and a geometrical thickness eof between 5 and 50 nm, a high-index third layer having a refractive index nof between 1.8 and 2.2 and a geometrical thickness eof between 70 and 120 nm, and a low-index fourth layer having a refractive index nof between 1.35 and 1:65 and a geometrical thickness eof at least 80 nm.