An illumination system for increasing a light signal from an object passing through a reflection cavity. The reflection cavity is disposed between spaced-apart, opposed first and second surfaces disposed on opposite sides of a moving stream of objects. A light collection system is disposed substantially...http://www.google.fr/patents/US6707551?utm_source=gb-gplus-shareBrevet US6707551 - Multipass cavity for illumination and excitation of moving objects
Multipass cavity for illumination and excitation of moving objects
