Ordinary spectrometer: through the capture of optical information by spectrometer, or the display and analysis of computerized automatic display digital instrument, we can know which elements are contained in the article. Spectrometer is the basic equipment for observing, analyzing and processing the structure and composition of substances by using optical principles, which has the advantages of high analysis accuracy, large measurement range, high speed and low sample consumption. Therefore, it is widely used in metallurgy, geology, petrochemical industry, medicine and health, environmental protection and other departments, and it is also an essential instrument for military reconnaissance, space exploration, resources and hydrological survey. [ 1]