A luminaire is provided which includes a reflector, a light source and a multilayer interference mirror. The light source is selected to emit monochromatic light. The multilayer interference mirror is disposed in a path of light emitted from the light source and is designed for angularly selecting a...http://www.google.de/patents/US4161015?utm_source=gb-gplus-sharePatent US4161015 - Luminaire using a multilayer interference mirror
