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...http://www.google.se/patents/US6700112?utm_source=gb-gplus-sharePatent US6700112 - High-reflectance paint for high-intensity optical applications