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US 10,871,644 B2Granted
Enhancement of output of optically pumped phosphor by use of surface nanostructures
AssigneeMaterion Corporation
InventorsRobert Sprague, Michael P. Newell
Life of this patent
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Abstract
Phosphor elements comprising phosphors in a host material having a phosphorescence-emitting surface with surface nanostructures are disclosed. Phosphor wheels having such phosphor elements, methods of making such phosphor elements, and methods of using such phosphor elements are also disclosed.
Claims16
A phosphor element comprising:
- a host material defining the shape of the phosphor element;
- and
- one or more phosphors dispersed in the host material that emit phosphorescence in response to an optical pump beam;
- wherein the phosphor element has a phosphorescence-emitting surface with surface nanostructures which do not comprise the host material;
- and
- wherein the surface nanostructures have a lateral dimension Tx along an x-direction which is a statistical average spacing between adjacent surface nanostructures along the x-direction and a lateral dimension Ty along a y-direction which is a statistical average spacing between adjacent surface nanostructures along the y-direction, wherein the x-direction and the y-direction are mutually orthogonal and the lateral dimensions Tx and Ty are different, and wherein the different lateral dimensions Tx and Ty are effective to lead to optical emission anisotropy in the phosphorescence.
3 more elements
A phosphor element comprising:
- a host material defining the shape of the phosphor element;
- and
- one or more phosphors dispersed in the host material that emit phosphorescence in response to an optical pump beam;
- wherein the phosphor element has a phosphorescence-emitting surface with surface nanostructures having a lateral dimension Tx along an x-direction which is a statistical average spacing between adjacent surface nanostructures along the x-direction and a lateral dimension Ty along a y-direction which is a statistical average spacing between adjacent surface nanostructures along the y-direction,
- wherein the x-direction and the y-direction are mutually orthogonal, the lateral dimensions Tx and Ty are different and the different lateral dimensions Tx and Ty are effective to lead to optical emission anisotropy in the phosphorescence.
2 more elements
Dependencies are inferred from the claim text.