High-reflectance paint for high-intensity optical applications
US6974498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Oct 30, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V7/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Many commercial radiant energy processing systems, such as luminaires and light detectors, require highly efficient diffusely reflective surfaces that can withstand high temperatures. As disclosed herein, a reflector for such a device is constructed of a substrate with a reflective coating, for example painted onto one or more surfaces of the substrate. The coating material comprises a zinc oxide pigment, preferably an uncalcined zinc oxide together with a small amount of a dispersing agent. The pigment and water are mixed together with an alkali metal silicate vehicle-binder (preferably a potassium silicate), for example, in a sheer mixer. The resulting material can be painted onto the desired surface, for example by spraying, spot-brushing or dipping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.