Fig. 2
From: Photonic force optical coherence elastography for three-dimensional mechanical microscopy
Optical setup and data acquisition scheme for volumetric mechanical microscopy with PF-OCE. a The optical setup consisted of an SD-OCT system and a PF forcing beam combined in free space with the OCT sample arm beam. A function generator provided external modulation of the power of the PF forcing beam. b Illustrations of 3D BM-mode dataset for the beam-scanning (200-Hz frame rate) and modulation waveform (20-Hz modulation frequency) from the function generator for a 3D BM-mode acquisition. c Associated timing diagram for the acquisition scheme. SLD: superluminescent diode, LD: laser diode, PR: photoreceiver, LP: long-pass dichroic filter, BCM beam control module, XY two-axis galvanometer
