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To develop line-scan technology and design and construct macro-scale Raman chemical imaging instrumentation, and to develop methodology for macro-scale Raman imaging detection of contaminants and adulterants for food samples and food ingredients.
Approach:
Develop optical method to create laser-line illumination from a 785nm laser source. Implement Raman spectrograph with electron-multiplying charge-coupled device camera. Incorporate line laser and detector into a portable instrument for macro-scale Raman imaging of samples up to 10x20 cm in size. Develop computer programs for real-time data acquisition, data analysis, and classification. Perform system calibration/validation. Investigate contaminant and adulterant detection for food samples such as authentication of dry milk powder or other food ingredients, and detection of pesticide residues on fruits and leafy green vegetables.