Omnidirectional high chroma red structural color with combination metal absorber and dielectric absorber layers
First Claim
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1. An omnidirectional high chroma red structural color comprising:
- a multilayer stack having;
a reflective core layer;
a metal absorber layer extending across said reflective core layer; and
a dielectric absorber layer extending across said metal absorber layer;
said multilayer stack reflecting a single band of visible light with a hue between 0-40°
on an a*b* Lab color map, said single band of visible light having a hue shift within said 0-40°
on said a*b* Lab color map when viewed from all angles between 0-45°
normal to an outer surface of said multilayer stack.
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Abstract
A high-chroma omnidirectional red structural color pigment. The omnidirectional structural color pigment is in the form of a multilayer stack that has a reflective core layer, a metal absorber layer extending across the reflective core layer and a dielectric absorber layer extending across the metal absorber layer. The multilayer stack reflects a single band of visible light with a hue between 0-40°, and preferably between 10-30°, on an a*b* Lab color map. The single band of visible light has a hue shift of less than 30° on the a*b* Lab color map when viewed from all angles between 0-45° normal to an outer surface of the multilayer stack.
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Citations
19 Claims
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1. An omnidirectional high chroma red structural color comprising:
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a multilayer stack having; a reflective core layer; a metal absorber layer extending across said reflective core layer; and a dielectric absorber layer extending across said metal absorber layer; said multilayer stack reflecting a single band of visible light with a hue between 0-40°
on an a*b* Lab color map, said single band of visible light having a hue shift within said 0-40°
on said a*b* Lab color map when viewed from all angles between 0-45°
normal to an outer surface of said multilayer stack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for making an omnidirectional high chroma red structural color, the process comprising:
manufacturing a multilayer stack by; dry depositing a reflective core layer; dry depositing a metal absorber layer that extends across the reflective core layer; dry or wet depositing a dielectric absorber layer that extends across the metal absorber layer; and the multilayer stack reflecting visible light with a hue between 0-40°
on an a*b* Lab color map and having a hue shift within the 0-40°
on the a*b* Lab color map when viewed from all angles between 0-45°
normal to an outer surface of the multilayer stack.- View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
Specification