| 摘要 |
Described herein are transparent composites which are useful for improving indoor illumination. The transparent composite redirects sunlight so that illumination inside building is improved while also reducing or eliminating glaring. In some embodiments, the sunlight redirecting transparent composite comprises a transparent substrate and a holographic element, wherein the holographic element comprises an interference pattern that diffracts a selected portion of the incident solar light such that the light is redirected into the building at angle that provides improved illumination within the building. In some embodiments, the diffractive structures are the same across the length of the holographic element. In some embodiments, the diffractive structures continuously vary across the length of the holographic element. In some embodiments the system may also comprise luminescent wavelength conversion elements. In some embodiments, the luminescent material absorbs UV photons and converts these photons into visible wavelengths. |
