Multi-layered mirror
First Claim
1. A multi-layered mirror comprising:
- a substrate made of one of glass and transparent plastic;
a dielectric multi-layered coating disposed on the front side of said substrate; and
a light-absorbing layer formed on the backside of said substrate,said dielectric multi-layered coating comprising three to six dielectric layers laminated one on top of another and having alternately differing refractive indices, one of said dielectric layers being one of a single high-refractive index layer and single low-refractive index layer having an optical thickness of λ
0 /2, where λ
0 is a wavelength of light used as a reference measurement for design purposes, and each of the remaining layers has an optical thickness of λ
0 /4.
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Accused Products
Abstract
An improved mirror of a type especially advantageous for use as a rearview mirror for automotive applications. The inventive mirror employs a dielectric multi-layered coating formed on the front side of a glass or plastic transparent substract, the back side of which is provided with a light-absorbing layer. The dielectric coating is composed of three to six dielectric layers laminated one on top of another and having alternately differing refractive indices. At least one of the laminated dielectric layers has an optical thickness of λ0 /2, where λ0 is a wavelength of light used as a reference for design purposes and which is in a range of 500 to 580 nm for an incident angle of 0°, with each of the remaining dielectric layers having a thickness of λ0 /4.
26 Citations
16 Claims
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1. A multi-layered mirror comprising:
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a substrate made of one of glass and transparent plastic; a dielectric multi-layered coating disposed on the front side of said substrate; and a light-absorbing layer formed on the backside of said substrate, said dielectric multi-layered coating comprising three to six dielectric layers laminated one on top of another and having alternately differing refractive indices, one of said dielectric layers being one of a single high-refractive index layer and single low-refractive index layer having an optical thickness of λ
0 /2, where λ
0 is a wavelength of light used as a reference measurement for design purposes, and each of the remaining layers has an optical thickness of λ
0 /4. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multi-layered mirror comprising:
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a substrate made of one of glass and transparent plastic; a dielectric multi-layered coating disposed on the front side of said substrate; and a light-absorbing layer formed on the backside of said substrate, said dielectric multi-layered coating comprising three to six dielectric layers laminated one on top of another and having alternately differing refractive indices, one of said dielectric layers being a single high-refractive index layer and another layer being a single low-refractive index layer, said high-refractive index layer and said low-refractive index layer both having an optical thickness of λ
0 /2, where λ
0 is a wavelength of light used as a reference measurement for design purposes, and each of the remaining layers has an optical thickness of λ
0 /4.
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Specification