Fig. 1: Flash coherent CCD 3D imaging system.
From: Large-array sub-millimeter precision coherent flash three-dimensional imaging
a Schematic of the 3D imaging system. MZM: Mach-Zehnder modulator. L: lens. P: polarizer. QWP: quarter-wave plate. NPBS: non-polarized beam splitter. PBS: polarized beam splitter. CCD: charge-coupled device. b Principle of the imaging system. \({f}_{m}\): frequency of the microwave signal. \({A}_{l}\) and \({A}_{e}\): amplitude of the local and echo optical signal. \({A}_{l}{A}_{e}\): multiplication component. \({U}_{sig}\): integrated term derived from the multiplication component. \({T}_{e}\): exposure time of each frame. τ: time delay.
