# Summary of optical spectroscopy methods The choice of an optical spectroscopy technique, the measurement setup and the recording of the spectra must be carefully considered, and the following overviews are intended to provide an initial starting point.
**Electron excitation** **Vibrational spectroscopy**
**UV/VIS** **Fluorescence** **NIR** **MIR** **RAMAN**
**Signal** Absorption Emission Absorption Absorption Scattering
**Excitation** Halogen, Deuterium (UV) Discharge lamp, Laser Halogen Thermal emitter Laser
**Detector** Si Si InGaAs MCT MCT Si InGaAs
**Sensitivity** high high mid high mid
**Specifics** - Detector 90° in direction of excitation - Special optical materials longpass filter for excitation blocking
**Imaging** simple higher effort simple high effort higher effort