拉曼光谱仪是根据拉曼效应用于研究和分析物质分子结构及特性的仪器。早期激光拉曼光谱仪多采用氦氖或氩离子激光，光学系统由二联单色器发展至三联单色器,杂散光低于加一’～10－“，接收系统采用探测器致冷及低噪声放大器或光子计数器，仪器性能几乎接近光学、电学系统的极限 Raman spectroscopy is based on the Raman effect used to study and analyze the molecular structure and properties of the instrument. Early laser Raman spectroscopy and more use of helium-neon or argon-ion laser, the optical system from two monochromators to the triple monochromator, stray light is lower than plus a ’~ 10-’, the receiving system using detector cooling and low noise Amplifier or photon counter, instrument performance is almost close to the optical, electrical system limits