Patent ID: 6661510
Filing Date: 2003-12-09
Classification: G01N

Abstract:
A device for detection of one or several fluorescent species, said species being contained in a medium, said medium being contained in a conduit, said device comprising a means of exciting the fluorescent species by light in an illumination zone, and means of collection and detection of fluorescent light emitted by said fluorescent species, said medium and conduit making up a structure that is transparent to the exciting light and to fluorescent light emitted by said fluorescent species, and said device comprising several such structures, characterised in that the refractive index of said medium is larger than that of said conduit or characterised in that said conduit is made of fused silica, quartz, or an organic polymer which conduit has an external organic polymer coating which has a refractive index lower than that of the fused silica, quartz, or organic polymer and which coating is transparent to the exciting light, so that at least part of the emitted fluorescent light is guided away from the illumination zone by total internal reflection in said structures and collected from one end of said structures.