DURABLE ANTI-REFLECTIVE ARTICLES
First Claim
1. An article comprising:
- a substrate having a major surface; and
an anti-reflective coating having a thickness of about 1 μ
m or less disposed on the major surface, the anti-reflective coating comprising an anti-reflective surface,wherein the article exhibits a maximum hardness of about 8 GPa or greater as measured by a Berkovich Indenter Hardness Test along an indentation depth of about 50 nm or greater;
wherein the article exhibits either one or both of;
a single side average light transmittance of about 94% or greater over an optical wavelength regime anda single side light reflectance of about 2% or less over the optical wavelength regime, andwherein the article exhibits a b* value, in reflectance, in the range from about −
5 to about 1 as measured on the anti-reflective surface only at all incidence illumination angles in the range from about 0 degrees to about 60 degrees.
1 Assignment
0 Petitions
Accused Products
Abstract
Embodiments of durable, anti-reflective articles are described. In one or more embodiments, the article includes a substrate and an anti-reflective coating disposed on the major surface. The article exhibits an average light transmittance of about 94% or greater over an optical wavelength regime and/or an average light reflectance of about 2% or less over the optical wavelength regime, as measured from an anti-reflective surface. In some embodiments, the article exhibits a maximum hardness of about 8 GPa or greater as measured by a Berkovich Indenter Hardness Test along an indentation depth of about 50 nm or greater and a b* value, in reflectance, in the range from about −5 to about 1 as measured on the anti-reflective surface only at all incidence illumination angles in the range from about 0 degrees to about 60 degrees under an International Commission on Illumination illuminant.
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Citations
30 Claims
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1. An article comprising:
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a substrate having a major surface; and an anti-reflective coating having a thickness of about 1 μ
m or less disposed on the major surface, the anti-reflective coating comprising an anti-reflective surface,wherein the article exhibits a maximum hardness of about 8 GPa or greater as measured by a Berkovich Indenter Hardness Test along an indentation depth of about 50 nm or greater; wherein the article exhibits either one or both of; a single side average light transmittance of about 94% or greater over an optical wavelength regime and a single side light reflectance of about 2% or less over the optical wavelength regime, and wherein the article exhibits a b* value, in reflectance, in the range from about −
5 to about 1 as measured on the anti-reflective surface only at all incidence illumination angles in the range from about 0 degrees to about 60 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An article comprising:
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a substrate having a major surface; and an anti-reflective coating having a thickness of about 1 μ
m or less disposed on the major surface, the anti-reflective coating comprising an anti-reflective surface,wherein the article exhibits a maximum hardness of about 8 GPa or greater as measured by a Berkovich Indenter Hardness Test along an indentation depth of about 50 nm or greater; wherein the article exhibits either one or both of; a single side average light transmittance of about 94% or greater over an optical wavelength regime and a single side light reflectance of about 2% or less over the optical wavelength regime, wherein the article exhibits a reflectance angular color shift of less than about 5, as measured on the anti-reflective surface from normal incidence to an incident illumination angle in the range from about 2 degrees to about 60 degrees under a D65 illuminant or F2 illuminant, wherein angular color shift is calculated using the equation √
((a*2−
a*1)2+(b*2−
b*1)2), with a*1, and b*1 representing the coordinates of the article when viewed at normal incidence and a*2, and b*2 representing the coordinates of the article when viewed at the incident illumination angle, andwherein the article exhibits either one or both article transmittance color coordinates in the (L*, a*, b*) colorimetry system at normal incidence the D65 or F2 illuminant exhibiting a reference point color shift of less than about 2 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0) and the transmittance color coordinates of the substrate, and article reflectance color coordinates in the (L*, a*, b*) colorimetry system at normal incidence exhibiting a color shift of less than about 5 from a reference point as measured at the anti-reflective surface, the reference point comprising at least one of the color coordinates (a*=0, b*=0), the coordinates (a*=−
2, b*=−
2), and the reflectance color coordinates of the substrate,wherein, when the reference point is the color coordinates (a*=0, b*=0), the color shift is defined by √
(a*article)2+(b*article)2),wherein, when the reference point is the color coordinates (a*=−
2, b*=−
2), the color shift is defined by √
(a*article+2)2+(b*article+2)2), andwherein, when the reference point is the color coordinates of the substrate, the color shift is defined by √
(a*article−
a*substrate)2+(b*article−
b*substrate)2).- View Dependent Claims (19, 20, 21, 22, 23)
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24. An article comprising:
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a substrate having a major surface; and an anti-reflective coating having a thickness of about 1 μ
m or less disposed on the major surface,wherein the article exhibits an abrasion resistance comprising any one or more of; about 1% haze or less, as measured using a hazemeter having an aperture, wherein the aperture has a diameter of about 8 mm, an average roughness, as measured by atomic force microscopy, of about 12 nm RMS or less, a scattered light intensity of about 0.05 (in units of 1/steradian) or less, at a polar scattering angle of about 40 degrees or less, as measured at normal incidence in transmission using an imaging sphere for scatter measurements, with a 2 mm aperture at 600 nm wavelength, and a scattered light intensity of about 0.1 (in units of 1/steradian) or less, at a polar scattering angle of about 20 degrees or less, as measured at normal incidence in transmission using an imaging sphere for scatter measurements, with a 2 mm aperture at 600 nm wavelength, wherein the abrasion resistance is measured after a 500-cycle abrasion using a Taber Test, wherein the article exhibits an average visible photopic reflectance of about 1% or less over the optical wavelength regime at normal incidence under a D65 or F2 illuminant, and wherein the article exhibits a b* value, in reflectance, in the range from about −
5 to about 1 as measured on the anti-reflective surface only at all incidence illumination angles in the range from about 0 degrees to about 60 degrees under a D65 illuminant or F2 illuminant. - View Dependent Claims (25, 26)
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27. An article comprising:
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a substrate having a major surface; and an anti-reflective coating having a thickness of about 1 μ
m or less disposed on the major surface,wherein the article exhibits an average visible photopic reflectance of about 0.7% or less over the optical wavelength regime at normal incidence under a D65 or F2 illuminant, wherein the article exhibits a b* value, in reflectance, in the range from about −
5 to about 1 as measured on the anti-reflective surface only at all incidence illumination angles in the range from about 0 degrees to about 60 degrees under a F2 illuminant, andwherein the article exhibits a reflectance angular color shift of less than about 5, as measured on the anti-reflective surface at all angles from normal incidence to an incident illumination angle in the range from about 20 degrees to about 60 degrees under a D65 illuminant or F2 illuminant and wherein angular color shift is calculated using the equation √
(a*2−
a*1)2+(b*2−
b*1)2), with a*1, and b*1 representing the coordinates of the article when viewed at normal incidence and a*2, and b*2 representing the coordinates of the article when viewed at the incident illumination angle. - View Dependent Claims (28, 29, 30)
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Specification