| 摘要 |
A fluorescence spectroscopic includes exciting optical means (1 to 7) for irradiating the same sample area (7) with a plurality of excitation lights of different wavelength bands, optical means (8 to 14) for repeatedly guiding fluorescences emitted by the sample in response to the respective excitation lights, to detection means, and calculation means (23) for performing analysis on the basis of a comparison of output signals corresponding to the fluorescences from the detection means (15, 16). The exciting optical means has excitation light varying means (20) for intermittently varying the intensity of at least one excitation light.
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