Thermally switched optical downconverting filter
US8076661B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2010 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jul 26, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2217/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A thermally switched optical downconverting (TSOD) filter is a self-regulating device including a downconverter that converts incoming light at a variety of wavelengths into longer-wavelength radiation and then directs it using one or more bandblock filters in either the inward or outward direction, depending on the temperature of the device. This control over the flow of radiant energy occurs independently of the thermal conductivity or insulating properties of the device and may or may not preserve the image and color properties of incoming visible light. The TSOD filter is energy-efficient as it can be used to regulate the internal temperature and illumination of buildings, vehicles, and other structures without the need for an external power supply or operator signals. The TSOD filter has unique aesthetic and optical properties not found in traditional windows, skylights, stained glass, light fixtures, glass blocks, bricks, or walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.