Radiation reflector and emitter
View Patent ↗A multi-layer radiation reflector/emitter includes first and second materials. The first material is transparent to radiation in a wavelength spectrum ranging from approximately 0.2 microns to at last 6 microns. The first material is a self-supporting arrangement of randomized particles having an average dimension in a range of approximately 0.2 microns to approximately 0.4 microns and defining a fill factor of approximately 0.1 to approximately 0.5. The second material reflects radiation having a wavelength greater than approximately 2 microns.
1. A multi-layer radiation reflector/emitter, comprising:
a layer of a first material transparent to radiation in a wavelength spectrum ranging from approximately 0.2 microns to at least 6 microns, said first material consisting of a self-supporting arrangement of randomized particles having an average dimension in a range of approximately 0.2 microns to approximately 0.4 microns and defining a fill factor of approximately 0.1 to approximately 0.5; and
a layer of a second material for reflecting radiation having a wavelength greater than approximately 2 microns.
2. A multi-layer radiation reflector/emitter as in claim 1 , wherein said second material comprises silver.
3. A multi-layer radiation reflector/emitter as in claim 1 , wherein said particles include fibrous particles.
4. A multi-layer radiation reflector/emitter as in claim 1 , wherein said particles include powder particles.
5. A multi-layer radiation reflector/emitter as in claim 1 , wherein said first material is bonded to said second material.
6. A multi-layer radiation reflector/emitter as in claim 1 , wherein said first material is selected from the group consisting of cesium bromide, potassium bromide, potassium chloride, sodium chloride, barium fluoride, calcium fluoride, and magnesium fluoride.
7. A multi-layer radiation reflector/emitter, comprising:
a first layer of a radiation-scattering material consisting of a self-supporting arrangement of randomized particles having an average dimension in a range of approximately 0.2 microns to approximately 0.4 microns and defining a fill factor of approximately 0.1 to approximately 0.5, said radiation-scattering material selected from the group of cesium bromide, potassium bromide, potassium chloride, sodium chloride, barium fluoride, calcium fluoride, and magnesium fluoride; and
a second layer of a material adjacent to said first layer for reflecting radiation having a wavelength greater than approximately 2 microns.
8. A multi-layer radiation reflector/emitter as in claim 7 , wherein said second layer comprises silver.
9. A multi-layer radiation reflector/emitter as in claim 7 , wherein said particles include fibrous particles.
10. A multi-layer radiation reflector/emitter as in claim 7 , wherein said particles include powder particles.
11. A multi-layer radiation reflector/emitter as in claim 7 , wherein said first layer is bonded to said second layer.
12. A multi-layer radiation reflector/emitter, comprising:
a metallic film; and
a layer of a radiation-scattering material on said film, said layer consisting of a self-supporting arrangement of randomized particles having an average dimension in a range of approximately 0.2 microns to approximately 0.4 microns and defining a fill factor of approximately 0.1 to approximately 0.5, said radiation-scattering material selected from the group of cesium bromide, potassium bromide, potassium chloride, sodium chloride, barium fluoride, calcium fluoride, and magnesium fluoride.
13. A multi-layer radiation reflector/emitter as in claim 12 , wherein said metallic film comprises a film of silver.
14. A multi-layer radiation reflector/emitter as in claim 12 , wherein said particles include fibrous particles.
15. A multi-layer radiation reflector/emitter as in claim 12 , wherein said particles include powder particles.
16. A multi-layer radiation reflector/emitter as in claim 12 , wherein said layer of said radiation-scattering material is bonded to said metallic film.