Figure 8. An in-fibre interferometer equipped with all three scanners for time domain optical coherence tomography. SLD, superluminescent diode; DC, directional coupler; C1, C2, microscope objectives; M, mirror; SXY, galvanometer scanning mirror head; MX, MY, scanner mirrors; L1, L2, lenses; PD, photodetector; ASO, analogue storage oscilloscope; TX, TY, triangle waveform generators.