Patent ID: 6831748
Filing Date: 2004-12-14
Classification: G01N

Abstract:
A plasmon resonance sensor, comprising:an optically transparent body (1); a reflective metal layer (2) or semiconductor layer, wherein said reflective metal layer or semiconductor layer is applied to one face of the body (1) and has a surface sensitive to molecules to be detected, thereby forming a measurement cell in conjunction with a cuvette; a light source for emitting a divergent light pencil or beam path (6) through the optically transparent body (1) onto an inner face of the layer (2); and a detector (11, 17), wherein the detector is assigned to the emerging beam path reflected by the layer (2) and registers as a function of time an angle of incidence of the light, wherein the angle of incidence of light changes as a result of molecule buildups on the sensitive surface, wherein an intensity minimum of emerging light occurs owing to resonance, wherein the light source is assigned a non-pointlike emission face (5) with an extent of at least 10 &mgr;m, and wherein a collimation lens (10) is arranged in the emerging beam path between the optically transparent body (1) and the detector (11, 17).