SPECTRAL WAVELENGTH DISCRIMINATION SYSTEM AND METHOD FOR USING

摘要

A spectral wavelength discrimination system and method are provided which allow the wavelength of a beam of radiation to be accurately determined. The system is useful for identifying the emission wavelength of a multi-component marker system. The system comprises an optical system (80, 82) for gathering and directing received radiation; a wavelength selective beamsplitter (34), termed a Linear Wavelength Filter, for directing predetermined fractions of the beam at each wavelength into each of two output beams; a detector (46, 48) for receiving each output beam to sense the intensity of each output beam; and a computer (66) for determining the wavelength of the received radiation. Intensity measurement of the output beams and selected system parameters, including the beamsplitter spectral characteristics and detector sensitivity characteristics are used in a special algorithm for performing Fourier based wavelength-dispersive analysis. The unique solution of the Fourier based analysis is the wavelength of the beam of radiation.