Fig. 1: Concepts of TDS.
From: High-precision time-domain stereoscopic imaging with a femtosecond electro-optic comb
a Simplified illustration of stereoscopy in space and in time. The light gray lines represent optical paths or time-of-flight. The symbols x and t correspond to space and time coordinates. b Optical sampling and time-domain disparities. In short, pulses arriving at different times produce different intensities on the two cameras. This intensity difference (ΔI), as a differential function of the pulses’ arrival time (Δt) relative to the time zero (the center of the gates), is used to determine distance.
