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Spectral imaging technologies for food safety and quality evaluations

USDA researchers in Beltsville, Maryland, have developed various spectral imaging technologies for applications in food safety and quality evaluations of agricultural commodities. We pioneered the online implementation of hyperspectral line-scan imaging technologies in a food processing environment, such as wholesomeness inspection of broiler chickens, and online safety and quality inspection of fresh produce. In addition, a macro-scale Raman chemical imaging system was developed to implement high-throughput Raman imaging using a 785-nm line-laser including a rapid line-scan system. The macro Raman imaging technologies have been used to authenticate powdered food ingredients and to detect chemical adulterants in powdered foods. The advancement of the above spectral imaging technologies is presented.