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Source page: http://commons.wikimedia.org/wiki/File:MultiPhotonExcitation-Fig6-doi10.1186slash1475-925X-5-36.JPEG


English: Original figure legend: MPE fluorescence emission distribution. Confinement of the emission process, in green, under red 2PE. Under 2PE the only molecules excited are those confined in a small subfemtoliter volume at the illumination beam focus position. This is particularly relevant for the photobleaching process that is globally reduced with respect to the 1PE case. The capacity of the volume can be approximatively calculated by using the resolution parameters of the optical system, since they are indicators of the volume containing the maximum photon density. This is valid only for non saturated processes. Under saturation of fluorescence beam intensity plays an important role in the emission shape and optical resolution.
Date 6 June 2006(2006-06-06)
Source Multi-photon excitation microscopy. BioMedical Engineering OnLine, 2006, 5:36.


Author Alberto Diaspro, Paolo Bianchini, Giuseppe Vicidomini, Mario Faretta, Paola Ramoino and Cesare Usai
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