The spatial resolution of Raman systems employing normal optical microscopes is limited to approximately the wavelength of the light (about 0.5 µm), because both the illuminating laser light and the Raman scattered light are collected in the optical far-field (i.e. many wavelengths of light away from the scattering material). Nanonics原子力顯微鏡與拉曼光譜儀Smiths紅外和SEM連用一體機