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1. CA2296339 - IMPROVED ANTI-REFLECTIVE COMPOSITE

Office
Canada
Application Number 2296339
Application Date 18.06.1998
Publication Number 2296339
Publication Date 04.02.1999
Grant Number
Grant Date 19.11.2002
Publication Kind C
IPC
G02B 1/115
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1Optical elements characterised by the material of which they are made; Optical coatings for optical elements
10Optical coatings produced by application to, or surface treatment of, optical elements
11Anti-reflection coatings
113using inorganic layer materials only
115Multilayers
G02B 1/14
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1Optical elements characterised by the material of which they are made; Optical coatings for optical elements
10Optical coatings produced by application to, or surface treatment of, optical elements
14Protective coatings, e.g. hard coatings
CPC
G02B 1/116
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1Optical elements characterised by the material of which they are made
10Optical coatings produced by application to, or surface treatment of, optical elements
11Anti-reflection coatings
113using inorganic layer materials only
115Multilayers
116including electrically conducting layers
G02B 1/11
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1Optical elements characterised by the material of which they are made
10Optical coatings produced by application to, or surface treatment of, optical elements
11Anti-reflection coatings
Applicants CPFILMS, INC.
Priority Data 09085844 28.05.1998 US
60/053,825 24.07.1997 US
60/053,891 28.07.1997 US
Title
(EN) IMPROVED ANTI-REFLECTIVE COMPOSITE
(FR) COMPOSITE ANTI-REFLETS AMELIORE
Abstract
(EN)

An anti-reflective composite is provided having very
high visible light transmission and negligible visible
reflectance over 400 nm-800 nm wavelengths. The composite of
the invention includes (a) a light transmissive substrate; (b)
a hard coat deposited onto the substrate; (c) a thin carbon
layer having an average thickness between about 2.ANG. and about
100.ANG.; and (d) a plurality of transparent oxide layer pairs
deposited onto the thin carbon layer, each transparent oxide
layer pair comprising (i) a first transparent oxide having a
refractive index between about 1.65 and about 2.65 and an
average thickness between about 100.ANG. and about 3200° and (ii)
a second transparent oxide layer having a refractive index
between about 1.2 and about 1.85, and an average thickness
between about 100.ANG. and about 3200.ANG.. The composite can also
include an intermediate oxide layer disposed between the thin
carbon layer and the first transparent oxide layer. Such
intermediate oxide layer has a refractive index between about
1.5 and about 2.2 and is between 400.ANG. and about 1000.ANG. in
thickness. In another preferred embodiment, the composite
further comprises an outermost transparent low surface energy
layer having a surface energy of less than about 40 dynes/cm.
In another preferred embodiment, the transparent layers are
deposited by vacuum or non-vacuum processes or by a combination
of both processes.