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. Author manuscript; available in PMC: 2014 Nov 21.
Published in final edited form as: Curr Protoc Cytom. 2012;59(125):1.25.1–1.25.21. doi: 10.1002/0471142956.cy0125s59

Figure 7.

Figure 7

Graphical representation of square wave modulation coupled with Fourier Transform analysis to extract multi-frequency information for heterogeneous fluorescence lifetime measurements. In the four quadrants of the figure, the harmonics (data simulated in MathCAD) are increased steadily to show that multiple frequencies can be extracted for multiple fluorescence decays.