Vis-OCT colposcopic imaging probes. (a) and (b) are the schematic and photograph of the circular scanning probe, respectively, (c) and (d) are the schematic and photograph of raster scanning probe, respectively. PSW, power supply wire; RT, rigid tube; FL, focus lens; GW, glass window; M, mirror; DCM, DC motor; DH, dome head; GS, galvo scanners.