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US 12,055,740 B2Granted
Multilayer optical thin film structure
AssigneeNational Research Council of Canada
InventorPenghui Ma
Life of this patent
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Abstract
There is described a multilayer optical thin film structure comprising multiple optically absorbing layers and multiple optically non-absorbing layers. The optically absorbing layers and the optically non-absorbing layers are configured such that light incident on the structure is reflected with a red colour at a first angle, and light incident on the structure is reflected with a yellow colour at a second angle. There is also described an item having applied thereto such a multilayer structure.
Claims25
A multilayer optical thin film structure comprising:
- multiple optically absorbing layers;
- and
- multiple optically non-absorbing layers,
- wherein the optically absorbing layers and the optically non-absorbing layers are configured such that visible light incident on the structure is reflected with a red colour at a first angle relative to a normal to a plane defined by the structure, and visible light incident on the structure is reflected with a yellow colour at a second angle relative to the normal to the plane defined by the structure, and
- wherein the first angle is smaller than the second angle.
2 more elements
Dependencies are inferred from the claim text.