Composite material for lighting filtering, lighting apparatus, and method for determining doping concentration or thickness of composite material
A composite material ( 11,21 ) for light filtering, comprising: a polymeric matrix material and particles of neodymium compound doped in the polymeric matrix material. A lighting apparatus ( 10,20 ) comprises the composite material. A method for determining a doping concentration of particles of neodymium compound in the composite material, and a method for determining a thickness of the composite material are also described.
1. A lighting apparatus, comprising:
a white LED package capable of generating a yellow light, the LED package comprising a blue light source with a peak wavelength less than 435 nm and a phosphor; and
an optical component,
wherein at least part of the yellow light generated by the white LED package is filtered by the optical component, and
wherein the optical component comprises a composite material having a polymeric matrix material and particles of neodymium compound doped in the polymeric matrix material, and a weight percentage of the particles of neodymium compound in the polymeric matrix material is from 0.4% to 8%.
2. The lighting apparatus of claim 1 , wherein the peak wavelength of the blue light source is less than 430 nm.
3. The lighting apparatus of claim 2 , wherein the range of the peak wavelength of the blue light source is from 420 nm to 430 nm.
4. The lighting apparatus of claim 1 , wherein the weight percentage of the particles of neodymium compound in the polymeric matrix material is from 2% to 8%.
5. The lighting apparatus of claim 4 , wherein the weight percentage of the particles of neodymium compound in the polymeric matrix material is from 4% to 6%.
6. The lighting apparatus of claim 1 , wherein the thickness of the optical component ranges from 1 mm to 14 mm.
7. The lighting apparatus of claim 6 , wherein the thickness of the optical component ranges from 1 mm to 9 mm.
8. The lighting apparatus of claim 1 , comprising: particles of additive doped in the polymeric matrix material for light diffusion.
9. The lighting apparatus of claim 1 , wherein the difference of refractive indices of the polymeric matrix material and the particles of neodymium compound is less than 0.1 in the visible light region.