BROADBAND REFLECTORS, CONCENTRATED SOLAR POWER SYSTEMS, AND METHODS OF USING THE SAME
First Claim
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1. A broadband reflector comprising:
- a UV-reflective multilayer optical film having a first major surface and comprising a UV-reflective optical layer stack, wherein the UV-reflective optical layer stack comprises first optical layers and second optical layers, wherein at least a portion of the first optical layers and at least a portion of the second optical layers are in intimate contact and have different refractive indexes; and
a VIS/IR-reflective metal layer disposed on at least a portion of the first major surface.
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Abstract
Broadband reflectors include a UV-reflective multilayer optical film and a VIS/IR-reflective layer. In various embodiments, the VIS/IR reflective layer may be a reflective metal layer or a multilayer optical film. Concentrated solar power systems and methods of harnessing solar energy using the broadband reflectors and optionally comprising a celestial tracking mechanism are also disclosed
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Citations
34 Claims
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1. A broadband reflector comprising:
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a UV-reflective multilayer optical film having a first major surface and comprising a UV-reflective optical layer stack, wherein the UV-reflective optical layer stack comprises first optical layers and second optical layers, wherein at least a portion of the first optical layers and at least a portion of the second optical layers are in intimate contact and have different refractive indexes; and a VIS/IR-reflective metal layer disposed on at least a portion of the first major surface. - View Dependent Claims (2, 3, 16, 17, 18, 19, 24, 28, 31, 32, 33, 34)
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4. A broadband reflector comprising:
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a UV-reflective multilayer optical film having a first major surface and comprising a UV-reflective optical layer stack, wherein the UV-reflective optical layer stack comprises first optical layers and second optical layers, wherein at least a portion of the first optical layers and at least a portion of the second optical layers are in intimate contact and have different refractive indexes, and wherein the UV-reflective optical layer stack is reflective to UV-light; a VIS/IR-reflective multilayer optical film comprising a VIS/IR-reflective optical layer stack, wherein the VIS/IR-reflective optical layer stack comprises third optical layers and fourth optical layers, wherein at least a portion of the third optical layers and at least a portion of the fourth optical layers are in intimate contact and have different refractive indexes, and wherein the VIS/IR-reflective multilayer optical film is reflective to VIS/IR-light; and a UV-absorbing layer disposed between the first major surface of the UV-reflective multilayer optical film and the VIS/IR-reflective multilayer optical film, wherein the UV-absorbing layer comprises a polymer and a UV-absorber. - View Dependent Claims (5, 6, 7, 9, 10, 13)
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8. (canceled)
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11-12. -12. (canceled)
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14-15. -15. (canceled)
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20-23. -23. (canceled)
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25-27. -27. (canceled)
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29-30. -30. (canceled)
Specification