DURABLE HYBRID OMNIDIRECTIONAL STRUCTURAL COLOR PIGMENTS FOR EXTERIOR APPLICATIONS

摘要

A hybrid omnidirectional structural color pigment. The pigment exhibits a visible color to the human eye and has a very small or non-noticeable color shift when exposed to broadband electromagnetic radiation (e.g. white light) and viewed from angles between 0 and 45° relative to the normal of an outer surface of the pigment. The pigment is in the form or a multilayer stack that has a reflective core layer and at least two high index of refraction (nh) layers. One of the nh layers can be a dry deposited nh dielectric layer that extends across the reflective core layer and one of the layers can be a wet deposited nh outer protective coating layer. An absorber layer that extends between the dry deposited nh dielectric layer and the wet deposited nh outer protective layer can also be included.

主权项

1. A hybrid omnidirectional structural color pigment comprising:
a multilayer stack having:
a reflective core layer;a dry deposited high index of refraction (nh) dielectric layer extending across said reflective core layer;a dry deposited absorber layer extending across said nh dielectric layer; anda wet deposited nh outer oxide layer extending across said absorber layer; said multilayer stack having a reflection band with a predetermined full width at half maximum (FWHM) of less than 300 nm and a predetermined color hue shift of less than 30° when said multilayer stack is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45° relative to normal of an outside surface of said multilayer stack.