Red omnidirectional structural color made from metal and dielectric layers
First Claim
1. A multilayer stack displaying a red omnidirectional structural color comprising:
- a reflector layer;
a dielectric layer extending across said reflector layer, said reflector layer and said dielectric layer reflecting more than 70% of incident white light with wavelengths greater than 550 nm; and
a selective absorber layer extending across said dielectric layer, said selective absorber layer absorbing more than 70% of said incident white light with wavelengths less than 550 nm when the multilayer stack is viewed from angles between 0 and 45 degrees;
said reflector layer, dielectric layer and selective absorber layer forming an omnidirectional reflector, said omnidirectional reflector reflecting a single narrow band of visible electromagnetic radiation with a center wavelength between 550-700 nm, a width of less than 200 nm wide and a color shift of less than 60 nm when said omnidirectional reflector is viewed from angles between 0 and 45 degrees, the omnidirectional reflector displaying a red omnidirectional structural color.
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Accused Products
Abstract
A multilayer stack displaying a red omnidirectional structural color. The multilayer stack includes a reflector layer, a dielectric layer extending across the reflector layer, and an absorbing layer extending across the dielectric layer. The dielectric layer reflects more than 70% of incident white light that has a wavelength greater than 580 nanometers (nm). In addition, the absorbing layer absorbs more than 70% of the incident white light with a wavelength less than 580 nm. In combination, the reflector layer, dielectric layer, and absorbing layer form an omnidirectional reflector that reflects a narrow band of electromagnetic radiation with a center wavelength between 580-680 nm, has a width of less than 200 nm wide and a color shift of less than 100 nm when the reflector is viewed from angles between 0 and 45 degrees.
193 Citations
29 Claims
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1. A multilayer stack displaying a red omnidirectional structural color comprising:
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a reflector layer; a dielectric layer extending across said reflector layer, said reflector layer and said dielectric layer reflecting more than 70% of incident white light with wavelengths greater than 550 nm; and a selective absorber layer extending across said dielectric layer, said selective absorber layer absorbing more than 70% of said incident white light with wavelengths less than 550 nm when the multilayer stack is viewed from angles between 0 and 45 degrees; said reflector layer, dielectric layer and selective absorber layer forming an omnidirectional reflector, said omnidirectional reflector reflecting a single narrow band of visible electromagnetic radiation with a center wavelength between 550-700 nm, a width of less than 200 nm wide and a color shift of less than 60 nm when said omnidirectional reflector is viewed from angles between 0 and 45 degrees, the omnidirectional reflector displaying a red omnidirectional structural color. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A paint pigment in the form of a multilayer stack, said paint pigment comprising:
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a reflector layer; a dielectric layer extending across said reflector layer, said reflector layer and said dielectric layer reflecting more than 70% of incident white light with wavelengths greater than 550 nm; and a selective absorber layer extending across said dielectric layer, said selective absorber layer absorbing more than 70% of said incident white light with wavelengths less than 550 nm when the multilayer stack is viewed from angles between 0 and 45 degrees; said reflector layer, dielectric layer and selective absorber layer forming an omnidirectional reflector, said omnidirectional reflector reflecting a single narrow band of visible electromagnetic radiation with a center wavelength between 550-700 nm, a width of less than 100 nm wide and a color shift of less than 60 nm when said omnidirectional reflector is viewed from angles between 0 and 45 degrees, the omnidirectional reflector displaying a red omnidirectional structural color.
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29. A paint pigment in the form of a multilayer stack, said paint pigment comprising:
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a reflector layer; a dielectric layer extending across said reflector layer, said reflector layer and said dielectric layer reflecting more than 70% of incident white light with wavelengths greater than 550 nm; and a selective absorber layer extending across said dielectric layer, said selective absorber layer absorbing more than 70% of said incident white light with wavelengths less than 550 nm when the multilayer stack is viewed from angles between 0 and 45 degrees; said reflector layer, dielectric layer and selective absorber layer forming an omnidirectional reflector, said omnidirectional reflector reflecting a single narrow band of visible electromagnetic radiation with a UV-sided edge and an IR edge of the IR spectrum, said single narrow band of visible electromagnetic radiation having a width of less than 200 nm wide and a shift of said UV-sided edge of less than 75 nm when said omnidirectional reflector is viewed from angles between 0 and 45 degrees, the omnidirectional reflector displaying a red omnidirectional structural color.
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Specification