2.2 Visible/Color Images
A USB microscope, Model 5MP Edge AM7915MZT, AnMO Electronics Corp. (New Taipei City, Taiwan) equipped with a visible polarizer was use used to acquired visible images of all samples. The digital microscope captures 5 mega-pixel (2952 x 1944) color images. Eight white LED lights contained in the camera illuminate the sample and a single polarization element is utilized to reduce glare.