Coatings of non-planar substrates and methods for the production thereof

A coated article comprising:

• a substrate having a major surface, the major surface comprising a first portion and a second portion, wherein a first direction that is normal to the first portion of the major surface is not equal to a second direction that is normal to the second portion of the major surface, and the angle between the first direction and the second direction is in a range of from about 10 degrees to about 180 degrees;
• and
• an optical coating disposed on at least the first portion and the second portion of the major surface, the optical coating forming an anti-reflective surface, wherein:
• the coated article exhibits at the first portion of the major surface and at the second portion of the major surface a hardness of about 8 GPa or greater;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the first portion of the major surface of about 2% or less, wherein the photopic reflectance of the first portion is measured at a first incident illuminati on angle relative to the first direction, wherein the first incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the first direction;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the second portion of the major surface of about 2% or less, wherein the photopic reflectance of the second portion is measured at a second incident illumination angle relative to the second direction, wherein the second incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the second direction;
• the photopic reflectance at the first portion and at the second portion is measured over an optical wavelength regime in a range of from about 400 nm to about 800 nm;
• and
• the coated article further comprising:
• a difference in reflected color of the coated article between the first portion of the major surface and the second portion of the major surface is less than or equal to about 5 as measured by the reflectance color coordinates in the (L*, a*, b*) colorimetry system under an International Commission on Illumination illuminant, wherein the difference in reflected color is defined as √((a*first portion−a*second portion)2+(b*first portion−b*second portion)2), and wherein the reflected color at the first portion is measured at a first incident illumination angle relative to the first direction, wherein the first incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the first direction, and the reflected color at the second portion is measured at a second incident illumination angle relative to the second direction, wherein the second incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the second direction.

A coated article comprising:

• a substrate having a major surface, the major surface comprising a first portion and a second portion, wherein a first direction that is normal to the first portion of the major surface is not equal to a second direction that is normal to the second portion of the major surface, and the angle between the first direction and the second direction is in a range of from about 10 degrees to about 180 degrees;
• and
• an optical coating disposed on at least the first portion and the second portion of the major surface, the optical coating forming an anti-reflective surface, wherein:
• the coated article exhibits at the first portion of the major surface and at the second portion of the major surface a hardness of about 8 GPa or greater;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the first portion of the major surface of about 2% or less, wherein the photopic reflectance of the first portion is measured at a first incident illuminati on angle relative to the first direction, wherein the first incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the first direction;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the second portion of the major surface of about 2% or less, wherein the photopic reflectance of the second portion is measured at a second incident illumination angle relative to the second direction, wherein the second incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the second direction;
• the photopic reflectance at the first portion and at the second portion is measured over an optical wavelength regime in a range of from about 400 nm to about 800 nm;
• and
• the optical coating comprises a first gradient layer in contact with the substrate, a scratch-resistant layer over the first gradient layer, and a second gradient layer over the scratch-resistant layer which defines the anti-reflective surface, wherein:
• the refractive index of the first gradient layer at the substrate is within 0.2 of the refractive index of the substrate;
• the refractive index of the first gradient layer at the scratch-resistant layer is within 0.2 of the refractive index of the scratch-resistant layer;
• the refractive index of the second gradient layer at the scratch-resistant layer is within 0.2 of the refractive index of the scratch-resistant layer;
• and
• the refractive index of the second gradient layer at the anti-reflective surface is from about 1.35 to about 1.7.

A coated article comprising:

• a substrate having a major surface, the major surface comprising a first portion and a second portion, wherein a first direction that is normal to the first portion of the major surface is not equal to a second direction that is normal to the second portion of the major surface, and the angle between the first direction and the second direction is in a range of from about 10 degrees to about 180 degrees;
• and
• an optical coating disposed on at least the first portion and the second portion of the major surface, the optical coating forming an anti-reflective surface, wherein:
• the coated article exhibits at the first portion of the major surface and at the second portion of the major surface a hardness of about 8 GPa or greater;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the first portion of the major surface of about 2% or less, wherein the photopic reflectance of the first portion is measured at a first incident illumination angle relative to the first direction, wherein the first incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the first direction;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the second portion of the major surface of about 2% or less, wherein the photopic reflectance of the second portion is measured at a second incident illumination angle relative to the second direction, wherein the second incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the second direction;
• the photopic reflectance at the first portion and at the second portion is measured over an optical wavelength regime in a range of from about 400 nm to about 800 nm;
• and
• the optical coating comprises a gradient layer in contact with the substrate, a scratch-resistant layer over the gradient layer, and an anti-reflective coating over the scratch-resistant layer which defines the anti-reflective surface, wherein:
• the refractive index of the gradient layer at the substrate is within 0.2 of the refractive index of the substrate;
• the refractive index of the gradient layer at the scratch-resistant layer is within 0.2 of the refractive index of the scratch-resistant layer;
• and
• the anti-reflective coating comprises at least a low RI layer and a high RI layer.

A coated article comprising:

• a substrate having a major surface, the major surface comprising a first portion and a second portion, wherein a first direction that is normal to the first portion of the major surface is not equal to a second direction that is normal to the second portion of the major surface, and the angle between the first direction and the second direction is in a range of from about 10 degrees to about 180 degrees;
• and
• an optical coating disposed on at least the first portion and the second portion of the major surface, the optical coating forming an anti-reflective surface, wherein:
• the coated article exhibits at the first portion of the major surface and at the second portion of the major surface a hardness of about 8 GPa or greater;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the first portion of the major surface of about 2% or less, wherein the photopic reflectance of the first portion is measured at a first incident illuminati on angle relative to the first direction, wherein the first incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the first direction;
• the coated article exhibits a photopic reflectance as measured at the anti-reflective surface at the second portion of the major surface of about 2% or less, wherein the photopic reflectance of the second portion is measured at a second incident illumination angle relative to the second direction, wherein the second incident illumination angle comprises an angle in a range from about 0 degrees to about 60 degrees from the second direction;
• the photopic reflectance at the first portion and at the second portion is measured over an optical wavelength regime in a range of from about 400 nm to about 800 nm;
• and
• the optical coating comprises an anti-reflective coating in contact with the substrate, a scratch-resistant layer over the anti-reflective coating, and a gradient layer over the scratch-resistant layer which defines the anti-reflective surface, wherein:
• the anti-reflective coating comprises at least a low RI layer and a high RI layer;
• the refractive index of the anti-reflective coating at the scratch-resistant layer is within 0.2 of the refractive index of the scratch-resistant layer;
• and
• the refractive index of the gradient layer at the anti-reflective surface is from about 1.35 to about 1.7.