研究目的
To investigate the use of multi-modal nonlinear optical microscopy for direct mineralogical imaging of economic ore and rock samples, comparing it with standard scanning electron microscopy for validation.
研究成果
Multi-modal NLO microscopy, validated by SEM-EDS, offers a powerful new tool for rapid, preparation-free characterization of mineralogical features in economic ores and rocks, with potential applications in mining and metallurgical processing.
研究不足
Background signals and laser-induced sample damage issues in NLO imaging. SRS imaging may suffer from reduced contrast due to competing absorption and nonlinear scattering processes.
1：Experimental Design and Method Selection:
Utilized multi-modal nonlinear optical microscopy (SRS and SHG) for imaging mineralogical features. SEM with EDS was used for validation.
2：Sample Selection and Data Sources:
Economic ore and rock samples, including rare earth element ores and barite, were prepared as thin sections or ground particles.
3：List of Experimental Equipment and Materials:
Included a femtosecond laser system, laser scanning microscope, SEM equipped with EDX spectrometer, and various optical components.
4：Experimental Procedures and Operational Workflow:
Samples were imaged using NLO microscopy and SEM-EDS. SRS/SHG signals were collected and compared with SEM-EDS elemental maps.
5：Data Analysis Methods:
Spectral scanning SRS was used to identify mineralogical regions based on Raman spectra. SHG signals were used to map non-centrosymmetric structures.
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