Coaxial light source spectroscope special coating, reduce light loss; Eliminate the double image and reflection of the acquired image; Good uniformity, high brightness, clear imaging; LED array arrangement, scientific heat dissipation design, fully ensure the brightness and service life of the product. Application range of scratches and indentation detection of highly reflective surfaces; Chip and silicon wafer damage detection; Mark point positioning; Two-dimensional code, bar code recognition; Character detection.