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. 2011 Jan 3;2011:870879. doi: 10.1155/2011/870879

Figure 3.

Figure 3

Illustration of the fluorescence lifetime principle. The short-pulsed excitation light (red) and the longer time duration fluorescence emission light (green) is shown as a function of time. In FLIM, the time scale of the fluorescence emission, τ, is measured.