Omnidirectional high chroma red structural colors
First Claim
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1. A multilayer interference thin film that reflects an omnidirectional high chroma red structural color comprising:
- a multilayer thin film having a reflector layer, at least one absorber layer extending across the reflector layer; and
an outer dielectric layer extending across the at least one absorber layer;
wherein the multilayer thin film reflects a single narrow band of visible light when exposed to white light and the outer dielectric layer has a thickness of less than or equal to 2.0 quarter wave (QW) of a center wavelength of the single narrow band of visible light, the single narrow band of visible light having;
a visible full width half maximum (FWHM) width of less than 200 nm;
a color between 0° and
30°
on a Lab color space; and
a hue shift of less than 30°
on the Lab color space when the multilayer thin film is viewed at angles between 0-45°
relative to a direction normal to an outer surface of the outer dielectric layer.
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Abstract
A multilayer thin film that reflects an omnidirectional high chroma red structural color. The multilayer thin film may include a reflector layer, at least one absorber layer extending across the reflector layer, and an outer dielectric layer extending across the at least one absorber layer. The multilayer thin film reflects a single narrow band of visible light when exposed to white light and the outer dielectric layer has a thickness of less than or equal to 2.0 quarter wave (QW) of a center wavelength of the single narrow band of visible light.
213 Citations
20 Claims
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1. A multilayer interference thin film that reflects an omnidirectional high chroma red structural color comprising:
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a multilayer thin film having a reflector layer, at least one absorber layer extending across the reflector layer; and
an outer dielectric layer extending across the at least one absorber layer;wherein the multilayer thin film reflects a single narrow band of visible light when exposed to white light and the outer dielectric layer has a thickness of less than or equal to 2.0 quarter wave (QW) of a center wavelength of the single narrow band of visible light, the single narrow band of visible light having; a visible full width half maximum (FWHM) width of less than 200 nm; a color between 0° and
30°
on a Lab color space; anda hue shift of less than 30°
on the Lab color space when the multilayer thin film is viewed at angles between 0-45°
relative to a direction normal to an outer surface of the outer dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An omnidirectional high chroma red structural color multilayer thin film comprising:
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a multilayer thin film having a reflector layer, a dielectric absorber layer extending across the reflector layer, an outer dielectric layer extending across the dielectric absorber layer and a transparent absorber layer extending between the dielectric absorber layer and the outer dielectric layer; wherein the multilayer thin film reflects a single narrow band of visible light when exposed to white light and the outer dielectric layer has a thickness of less than or equal to 2.0 quarter wave (QW) of a center wavelength of the single narrow band of visible light, the single narrow band of visible light having; a visible full width half maximum (FWHM) FWHM width of less than 200 nm; a color between 0° and
30°
on a Lab color space; anda hue shift of less than 30°
on the Lab color space when the multilayer thin film is viewed at angles between 0-45°
relative to a direction normal to an outer surface of the outer dielectric layer. - View Dependent Claims (18, 19, 20)
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Specification