Patent ID: 6570657
Filing Date: 2003-05-27
Classification: G01J,G01N

Abstract:
An arrangement for surface plasmon resonance spectroscopy (SPR), comprising:an optical prism, a sample cell being associated to said prism, said sample cell having at least two sample detection ranges; said arrangement being provided a thin metal layer adapted for the SPR method; at least one of said sample detection ranges being designed as a surface immobilized sample detection range, a broad-band light source for emitting light, said light being directed via a light conducting fiber and through a collimator to an entrance face of said optical prism, said collimator having an aperture adapted to a base face of said prism, said collimator collimating said light, a locally switchable diaphragm, said diaphragm being between said collimator and said entrance face, said diaphragm being adapted for passing through in a time one respective defined path of rays via the base face of said prism to one of said sample detection ranges, switching state of said diaphragm being adapted to be fed into an evaluation and control unit via a data and control line, said evaluation and control unit being for associating the actual switching state of said diaphragm to a respective spectrum corresponding to said actual switching state, spectra being obtainable by detection of the light leaving a prism exit face by way of a further collimator, an aperture of said further collimator being matched to said base face of said prism, an exit of said further collimator being connected to a further light conducting fiber, and the exit of said further light conducting fiber forming the entrance of a polychromator, within said polychromator the spectrally decomposed light being fed into a CCD-array and into a diode array, respectively, an exit of said CCD-array and diode array, respectively, being connected to said evaluation and control unit via a data-line.