Schematic diagram of the multimodality imaging system by combining OCT and FLIM subsystems. L1, L2 and L5: free-space collimation and coupling lenses, L3, L4, L6-L12: fiber-connected collimation and coupling lenses, NDF: neutral density filter, M1-M4: mirrors, DM1-DM4: dichroic mirrors, and F1-F4: filters. Reprinted with permission from (101). Copyright 2010 Optical Society of America.