Substrate with low-reflection property and manufacturing method thereof
Provided is a substrate with low-reflection property having small changes in reflected light and color between a principal surface and a side surface when it is visually recognized, and including high displayability in a front substrate or the like which is disposed while exposing the side surface. A substrate 10 with low-reflection property includes: a transparent substrate 11 ; a first low-reflection film 12 provided on one principal surface of the transparent substrate 11 ; and a second low-reflection film 13 provided on a side surface of the transparent substrate 11 , wherein luminous reflectance Rtot of the first low-reflection film 12 provided on one principal surface is 1.5% or less, luminous reflectance Rs of the second low-reflection film 13 provided on the side surface is 2.5% or less, chromaticity a* is 0 to 4, and chromaticity b* is 3 to 9.
1. A substrate with low-reflection property, comprising:
a transparent substrate;
a first low-reflection film provided on one principal surface of the transparent substrate;
a second low-reflection film provided on all side surfaces of the transparent substrate; and
a black printed shade on a part of the principal surface of the transparent substrate which is opposite from the first low-reflection film,
wherein luminous reflectance Rtot of the first low-reflection film provided on the one principal surface is 1.5% or less, luminous reflectance Rs of the second low-reflection film provided on the side surface is 2.5% or less, chromaticity a* of the second low-reflection film provided on the side surface is 0 to 4, and chromaticity b* of the second low-reflection film provided on the side surface is 3 to 9;
wherein the first low-reflection film is a multilayer film of between 2 to 8 layers of alternately stacked high-refractive index and low-refractive index layers; and
wherein the second low-reflection film is a multilayer film of between 2 to 8 layers of alternately stacked high-refractive index and low-refractive index layers.
2. The substrate with the low-reflection property according to claim 1 ,
wherein the first low-reflection film provided on an opposite side of the transparent substrate from the black printed shade has the chromaticity a* of more than −6 and less than 6, and the chromaticity b* of more than −6 and less than 6.
3. The substrate with the low-reflection property according to claim 1 ,
wherein the luminous reflectance Rtot of the first low-reflection film is 1.2% or less.
4. The substrate with the low-reflection property according to claim 1 ,
wherein the luminous reflectance Rs of the second low-reflection film provided on the side surface is 2% or less.
5. The substrate with the low-reflection property according to claim 1 ,
wherein a ratio of the luminous reflectance Rs to the luminous reflectance Rtot is 1 to 3.
6. The substrate with the low-reflection property according to claim 1 ,
wherein the transparent substrate has an asperity shape due to an antiglare treatment on each of the one principal surface and the side surfaces.
7. The substrate with the low-reflection property according to claim 1 ,
wherein the transparent substrate is a glass substrate.
8. The substrate with the low-reflection property according to claim 7 ,
wherein the glass substrate is a chemically tempered glass.
9. The substrate with the low-reflection property according to claim 8 ,
wherein a surface compressive stress of the chemically tempered glass is 400 MPa or more and 1200 MPa or less.
10. The substrate with the low-reflection property according to claim 9 ,
wherein a depth of a surface compressive stress layer of the chemically tempered glass is 15 μm to 60 μm.
11. A display device, comprising:
a display; and
the substrate with the low-reflection property according to claim 1 provided on a front face of the display as a front substrate.