Patent ID: 9709349
Date: 2017-07-18
CPC Classifications: B60H,B64G,B82Y,F28F,G02B,H01L

Claim:
1. A radiative cooling device for cooling an object while the device is exposed to, or under sunlight, the device comprising: a solar spectrum reflecting structure, including different materials at least one of which is layered or textured across with a dimension that is between 1 micron and 25 nanometers, the solar spectrum reflecting structure configured and arranged to suppress light modes, by inhibiting coupling of incoming electromagnetic radiation, of at least some wavelengths in the solar spectrum, to the device while the device is exposed to or under sunlight; a thermally-emissive structure configured and arranged to facilitate thermally-generated electromagnetic emissions, from the device while the device is exposed to or under sunlight, in mid- IR wavelengths; at least a portion of each of the solar spectrum reflecting structure and the thermally-emissive structure being integrated as a constitution configured and arranged to both inhibit coupling of the incoming electromagnetic radiation to the device and facilitate the thermally-generated electromagnetic emissions, from the device that is exposed to or under sunlight, in mid-IR wavelengths; and the said object thermally coupled to the device that is exposed to or under sunlight and configured to be cooled from the device that is exposed to or under sunlight and to a temperature that is below an ambient temperature.