Antireflection-coated transparent substrate exhibiting...

Details Antireflection-coated transparent substrate exhibiting... Antireflection-coated transparent substrate exhibiting...

2011-03-22

2011-03-22

Loney, Donald (Department: 1783)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C428S034000, C428S432000, C428S699000, C428S701000, C428S702000, C359S359000, C359S586000, C359S588000, C052S786100

Reexamination Certificate

active

07910215

ABSTRACT:
Transparent especially glass, substrate (6) 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 (1) having a refractive index n1between 1.8 and 2.3 and a geometrical thickness e1of between 10 and 25 nm; a low-index second film (2) with a refractive index n2of between 1.40 and 1.55 and a geometrical thickness e2of between 20 and 50 nm; a high-index third film (3) with a refractive index n3of between 1.8 and 2.3 and a geometrical thickness n3of between 110 and 150 nm; and a low-index fourth film (4) with a refractive index n4of between 1.40 and 1.55 and a geometrical thickness e4of between 60 and 95 nm, the algebraic sum of the geometrical thickness e3+e1being between 125 and 160 nm.

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patent: 6924037 (2005-08-01), Joret et al.
patent: 2006/0165963 (2006-07-01), Fleury et al.
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patent: 2004 005210 (2004-01-01), None
patent: 2005 016842 (2005-02-01), None

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