Patent ID: 8338800

Claim:
A photoluminescent fiber comprising: a) one or more photoluminescent phosphorescent materials and, b) one or more photoluminescent fluorescent materials; wherein the one or more photoluminescent phosphorescent materials absorb and emit electromagnetic energies when charged or activated by electromagnetic radiation from an excitation source incident upon the one or more phosphorescent materials, and wherein the one or more photoluminescent fluorescent materials absorb the emission from the one or more photoluminescent materials and emit electromagnetic energies to give a selected emission signature, the photoluminescent materials being selected so that the emission of one of the photoluminescent materials overlaps with the absorbance of another of the photoluminescent materials, wherein the selected emission signature is the emission from one or more of the selected photoluminescent fluorescent materials, such emission being essentially unabsorbed by any of the other photoluminescent materials.