Fig. 3: 3D imaging based on the spectrally encoded parallel LiDAR.

a Schematic of imaging targets, including a pedestrian, a cybertruck, and a helicopter, which were spatially arranged in sequence with 10 cm and 20 cm gaps between them. b Imaging results based on 51 individual channels. The vertical direction contains 88 segments, and the resolution is 51 × 88 pixels. Three dashed lines represent the-^# corresponding positions of channel 596 nm, 632 nm, and 659 nm, respectively. The dots in the XY plane represent the projections of three objects. c Schematic of the division of 51 channels. The 51-channel imaging was performed in three successive scans, each covering 17 channels with a spacing of 9 nm, resulting in an adequate channel spacing of 3 nm after combining the scan results. d Vertical scanning results of channel 596 nm, 632 nm, and 659 nm, respectively. e The statistical histogram of the pixels contained in three objects in (b). f Statistical box plot of the correlation intensity between the reference and the echo signals corresponding to each pixel of three objects.