Figure 2.

The block diagram of the system hardware is shown in (a). LABVIEW based control of the laser, TCSPC instrumentation and motors controlling the gantry, linear stage, and filter slides allow full automation of the data acquisition. The fan-beam detection geometry is shown in (b). Here, a single excitation source position is used and the diffuse signals at the surface of the specimen are collected using focalized detection. The detected signals are then separated, and directed to two sets of PMTs dedicated to Fl and Tr signals at each fiber channel.