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5 March 2021 Single-chip DMD-based hybrid holographic beam steering for lidar
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Abstract
A holographic lidar concept established on the Digital Micromirror Mirror (DMD)-based hybrid light modulation is reported, which multiplexes coarse-steering by sawtooth phase modulation and fine-steering by binary amplitude modulation. The hybrid steering is achieved by overlaying displayed Computer-Generated Holograms (CGHs) with a sawtooth blazed grating phase mask, which the blaze angle programmed by synchronized short-pulse illumination of transitioning micromirrors creating the CGHs. The steering principle is demonstrated as a 2D beam steering scheme with a 532 nm visible pulse laser, and implemented into a 905 nm lidar system with a 44° field-of-view, 0.9°×0.4° angular resolution, 7.8 FPS video frame rate, and 1 m detection distance.
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© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chuan Luo, Brandon Hellman, Guanghao Chen, Joshua Rodriguez, Charles Perkins, Jae-Hyeung Park, and Yuzuru Takashima "Single-chip DMD-based hybrid holographic beam steering for lidar", Proc. SPIE 11698, Emerging Digital Micromirror Device Based Systems and Applications XIII, 116980G (5 March 2021); https://doi.org/10.1117/12.2577288
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