Lighting apparatus
View Patent ↗A lighting apparatus includes at least one light source generating a visible light and an optical component, the optical component includes a transparent, translucent or reflective substrate and a coating on a surface of the substrate to cause a color filtering effect to the visible light passing through the optical component, the coating includes a compound containing Nd3+ ions and F″ ions.
1. A lighting apparatus comprising at least one light source generating a visible light and an optical component, the optical component comprising a transparent, translucent or reflective substrate and a coating on a surface of the substrate to cause a color filtering effect to the visible light passing through the optical component, the coating comprising a compound containing Nd 3+ ions and F − ions;
wherein the compound is an Nd—X—F compound, X comprising at least one element selected from the group consisting of: elements that form compounds with neodymium, and metallic elements that form compounds with fluorine, said metallic elements being different from neodymium.
2. The lighting apparatus according to claim 1 , wherein the light source is an LED.
3. The lighting apparatus according to claim 1 , wherein the compound is NdFO.
4. The lighting apparatus according to claim 1 , wherein the compound comprises discrete particles of an organic or inorganic material, particle size of the organic or inorganic material is from about 1 nm to about 10 μm.
5. The lighting apparatus according to claim 1 , wherein a weight percentage of the compound in the coating is from about 1% to about 20%.
6. The lighting apparatus according to claim 5 , wherein a weight percentage of the compound in the coating is from about 1% to about 10%.
7. The lighting apparatus according to claim 1 , wherein a thickness of the coating is from about 50 nm to about 1000 micrometer.
8. The lighting apparatus according to claim 1 , wherein the coating further comprises an additive having a higher refractive index than the compound, and wherein the additive is selected from metal oxides or non-metal oxides.
9. The lighting apparatus according to claim 8 , wherein the additive is selected from the group consisting of TiO 2 , SiO 2 and Al 2 O 3 .
10. The lighting apparatus according to claim 1 , wherein the coating is coated on the outside or inside surface of the substrate.
11. The lighting apparatus according to claim 1 , wherein the substrate is a diffuser, the diffuser is selected from a bulb, a lens, or an envelope enclosing the LED.
12. The lighting apparatus according to claim 1 , wherein the reflective substrate is configured to reflect the visible light generated by the light source.
13. The lighting apparatus according to claim 12 , wherein the at least one light source is arranged around the reflective substrate.
14. The lighting apparatus according to claim 1 , wherein shape of the substrate is flat or curved.
15. The lighting apparatus according to claim 1 , wherein the optical component further comprises an organic adhesive or an inorganic adhesive.
16. The lighting apparatus according to claim 1 , wherein the coating is coated on the surface of the substrate by a spray coating method.
17. The lighting apparatus according to claim 1 , wherein the coating is coated on the surface of the substrate by an electrostatic coating method.