| abstract |
(57) Abstract: An apparatus for detecting one or more fluorescent species, wherein the species is contained in a medium, the medium is contained in a conduit, and the apparatus excites the fluorescent species with light. The medium and the conduit form a structure, wherein the structure is transparent to the excited and emitted fluorescent light, and the device has one or more of the structures In a detection device of the type, at least a part of the emitted fluorescent light is guided to the structure by total internal reflection from an illumination zone and is collected from one end of the structure. |