Single-chip holographic beam steering for lidar by Digital Micromirror Device with angular and spatial hybrid multiplexing
Posted on 2020-07-10 - 13:53
A Digital Micromirror Device (DMD) based holographic beam steering technique is reported which multiplexes fine-steering binary amplitude gratings with a coarse-steering programmable blazed grating. The Angular Spatial Light Modulation (ASLM) technique encodes the spatial pattern of the binary amplitude grating at the same plane as the angular modulation set by a phase map of the DMD-based beam steering technique. The beam steering technique is demonstrated at 532 nm and implemented into a 905 nm lidar system. The results of the lidar system tests are presented, achieving a 44° field-of-view, 0.9°×0.4° (H×V) angular resolution, 1 m max distance, 1.5 kHz sampling, and 7.8 FPS video. Scalability techniques are proposed, including max distance increases to over 100 m.
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Hellman, Brandon; Luo, Chuan; Chen, Guanghao; Rodriguez, Joshua; Perkins, Charles; Park, Jae-Hyeung; et al. (2020). Single-chip holographic beam steering for lidar by Digital Micromirror Device with angular and spatial hybrid multiplexing. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4912440.v1
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AUTHORS (7)
BH
Brandon Hellman
CL
Chuan Luo
GC
Guanghao Chen
JR
Joshua Rodriguez
CP
Charles Perkins
JP
Jae-Hyeung Park
YT
Yuzuru Takashima