| 摘要 |
The invention relates to a surface plasmon resonance sensor comprising a base unit (2) containing a light source (6) for generating light beams (10) and an optical sensor unit (3; 21; 31; 103; 131) for exciting surface plasmons, said sensor unit having a measuring surface (18; 29; 122; 138) that is formed by a thin metal film and that can be brought into contact with a sample (19; 123) to be measured. The aim of the invention is to provide a surface plasmon resonance sensor (1) comprising a compact optical sensor unit (3; 21; 31; 103; 131) that is easy to replace reproducible quality. This is achieved by an optical sensor unit (3; 21; 31; 103; 131) comprising a prism (12; 22; 32; 112; 132) consisting of an optically transparent material. Areas (16, 20; 23, 24; 33, 34; 118, 119; 133, 134) of said prism (12; 22; 32; 112; 132) are configured in such a way, that they focus the light beams (10') emanating from the base unit (2) onto the measuring surface (18; 29; 122; 138). This is achieved, for example, by a convex curvature of the mirror-coated lateral surfaces or lenses that are integrated into the prism.
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