Coherent Microscopy and Optical Coherence Tomography for Biomedical Applications - Bioanalysis Advanced Materials Methods and Devices - page 114

Fig. 8.7 PSF of a coherent microscope (positive real part shown)
Fig. 8.8 Images taken with underwater DHM. ( a ) Paramecium. ( b - d ) Trajectories of various
species swimming through the observation window, with a frame rate of 10 frames/s. ( b ) Ciliate;
( c ), Didinium; ( d ) Rotifer (Reproduced with permission)
The scanning system is connected to the interferometer or OCT engine unit by a
fiber optic. Early time domain ophthalmic OCT systems (TD-OCT) used the
Michelson interferometer configuration as shown in Fig. 8.10 . In this case the
interference between object and reference paths is recorded as the depth scan is
performed by a mechanically driven mirror. OCT requires a bright light source of
limited temporal coherence and super-luminescent diodes, ultrashort pulse and
super-continuum lasers have all been used for this purpose [ 18 ].