A method of imaging organic and inorganic structures based on the principle of fluorescence - a spontaneous phenomenon in which, due to the absorption of a photon with sufficient energy by a fluorophore, the ground energy state is excited to a higher, excited state and the subsequent spontaneous emission of a photon during the transition back to a lower level. In fluorescence microscopy, a UV source is used in the form of Hg lamps, lasers, LEDs, etc.
