Peanut Kernels Quality Sorting by Optical Properties

In order to improve the quality of peanut kernels, the fluorescence properties and reflectance spectra of peanut kernels were measured and analyzed with the fluorescence microscope, fluorescence spectrophotometer and a system for measuring the optical properties. The characteristic wavelengths of reflectance spectra used to discriminate between low quality peanut kernels and normal peanut kernels were obtained. A computer controlled optical testing sorter with trifurcate optical fiber of collecting and conveying light was developed,with which the test of sorting peanut kernels was conducted.