C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 17/34 (2006.01) G02B 1/11 (2006.01)
Patent
CA 2491401
The invention concerns a transparent substrate (6) comprising on at least one of its surfaces an antiglare coating, in particular with normal incidence consisting of a stack (A) of thin films. The invention is characterized in that the stack successively comprises: one first film (1) of refractive index n¿1? ranging between 1.8 and 2.2 and of geometric thickness e¿1? ranging between 5 and 50 nm, a second film (2) of refractive index n¿2? ranging between 1.35 and 1.65 and of geometric thickness e¿2? ranging between 5 and 50 nm, a third film (3) of refractive index n¿3? ranging between 1.8 and 2.2 and of geometric thickness e¿3? ranging between 40 and 150 nm, a fourth film (4) of refractive index n¿4? ranging between 1.35 and 1.65 and of geometric thickness e¿4? ranging between 40 and 150 nm.
Substrat transparent (6) comportant sur au moins une de ses faces un revêtement antireflet, notamment à incidence normale fait d'un empilement (A) de couches minces, caractérisé en ce que l'empilement comporte successivement: un première couche (1) d'indice à refraction n1 compris entre 1,8 et 2,2 et d'une épaisseur géométrique e1 comprise entre 5 et 50 nm, une seconde couche (2) d'indice de réfraction n2 compris entre 1,35 et 1,65 et d'épaisseur géométrique e2 comprise entre 5 et 50 nm, une troisième couche (3) d'indice de réfraction n3 compris entre 1,8 et 2,2 et d'épaisseur géométrique e3 comprise entre 50 et 150 nm, une quatrième couche (4) d'indice de réfraction n4 compris entre 1,35 et 1,65 et d'épaisseur géométrique e4 comprise entre 40 et 150 nm.
Fleury Carinne
Heitz Thibaut
Nadaud Nicolas
Goudreau Gage Dubuc
Saint-Gobain Glass France
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