RADIATIVE COOLING OPTICAL FILTER, ITS PREPARING METHOD AND APPLICATION

This disclosure discloses a radiative cooling optical filter, comprising a substrate. One side of the substrate is polished, and the rough side of the substrate is provided with a metal reflective layer. The polished side of the substrate is subsequently provided with the intermediate layers and a t...

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Bibliographic Details
Main Authors ZHANG, Yueguang, MU, Wen, SHEN, Weidong, YUAN, Huaxin, ZHENG, Xiaowen, YUAN, Wenjia, WANG, Zhen, YANG, Chenying
Format Patent
LanguageEnglish
Published 24.06.2021
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:This disclosure discloses a radiative cooling optical filter, comprising a substrate. One side of the substrate is polished, and the rough side of the substrate is provided with a metal reflective layer. The polished side of the substrate is subsequently provided with the intermediate layers and a top layer. The intermediate layer comprises alternatingly arranged layers A and layers B. The thickness of each layer A and layer B is 50-400 nm. The material of the layer A is silicon dioxide or aluminum oxide, and the material of the layer B is titanium dioxide, silicon nitride or silicon carbide. The material of the top layer is ytterbium fluoride, yttrium fluoride or zinc sulfide. The intermediate layer and the top layer jointly constitute a multi-resonant absorption enhancer in the atmospheric transparent window.
Bibliography:Application Number: US201917263161