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Laser-Induced Coal Fluorescence Microscopy (Fluorescence Microscopy)

机译:激光诱导煤荧光显微镜(荧光显微镜)

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A new laser-equipped fluorescence microscopy system has been developed to significantly widen the scope of coal characterization. The system uses a pulsed tunable laser interfaced to a state-of-the-art fluorescence microscope system (Leitz MPV 3). The fluorescence of coal macerals is excited with ultraviolet radiation in the range 260 to 450 nm and analyzed in the range 300 to 800 nm. The temporal decay of the fluorescence after the laser is studied. The resulting decay times are determined and are believed to be as characteristic of the fluorescing macerals as the excitation and emission spectra. By combining the results from the time-domain and spectral studies, time-resolved emission (and excitation) spectra are obtained. In addition to pulsed laser excitation, the fluorescence is also excited with continuous radiation from xenon and mercury arc lamps and monitored in the wavelength ranges mentioned above. 1 figure, 1 table. (ERA citation 08:039983)

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